In accordance with bodybuilding purists, in the event you’re not doing the again squat, you’re flawed.
Whereas you can also make your legs “not small” with workouts just like the leg press, leg extension, and lunge, they are saying, you’ll by no means get the chiseled, tree-trunk legs that end result solely from the again squat.
A part of the explanation the again squat reigns supreme is it’s so freaking laborious, making a giant squat a ceremony of passage of kinds for weightlifters.
The again squat requires nearly each main muscle group in your physique to work in live performance to generate an amazing quantity of power, in addition to close to picture-perfect type in the event you’re ever going to place up spectacular numbers.
You possibly can cheat your means by way of the bench press and even the deadlift and finally transfer heavy masses, however not the again squat. Should you don’t have the whole-body power and method, there’s no solution to wiggle or jigger the load up. You simply get caught.
A superb squat is price much more than bragging rights, although.
It’s additionally one of many single greatest workouts for creating each main muscle group in your physique, from nosehole to butthole.
That’s solely true in the event you do it appropriately, although, which is precisely what you’re going to study on this article.
By the tip, you’ll know what the again squat is, why it’s useful, which muscle tissues it really works, tips on how to carry out correct again squat type, a stable again squat exercise, one of the best again squat alternate options, and extra.
What Is a Again Squat?
The again squat (also called the “barbell again squat,” “bb again squat,” or typically simply “the squat”) is a lower-body train that entails squatting with a barbell mendacity throughout your higher again.
Many well being and health specialists contemplate the again squat the “king of workouts” as a result of no different train trains as many muscle tissues concurrently, helps you achieve as a lot full-body muscle and power, or is as bodily and mentally taxing.
Entrance Squat vs. Again Squat
What makes the again squat completely different from the entrance squat is the place you place the bar. Within the again squat, you maintain the bar in place by making a “shelf” together with your rear delts that the bar lies throughout, whereas, within the entrance squat, the bar lies throughout the entrance of your shoulders and is held in place towards the bottom of your throat by your arms.
Shifting the load from the entrance to the again of your physique modifications how the train feels, which muscle tissues you emphasize, and the quantity of weight you’ll be able to elevate.
That stated, neither train is healthier or worse than the opposite. Though each workouts really feel fairly completely different, they practice the identical muscle tissues to an identical diploma, so you should use them interchangeably in your exercises.
In fact, there’s no cause to decide on only one. The very best resolution for most individuals is to incorporate each workouts in your program.
That’s why it doesn’t make sense to assume when it comes to again squat vs. entrance squat and as a substitute assume when it comes to again squat and entrance squat.
A great way to do that is to incorporate the again squat in your program for 8-to-10 weeks of coaching, take a deload, then substitute the again squat with the entrance squat for the next 8-to-10 weeks of coaching.
Then, you’ll be able to both proceed alternating between the workouts each few months like this or keep on with the one you like.
That is how I personally like to arrange my coaching, and it’s just like the strategy I advocate in my health books for women and men, Larger Leaner Stronger and Thinner Leaner Stronger.
(And in the event you’d like much more particular recommendation about how you need to set up your coaching to achieve your well being and health objectives, take the Legion Power Coaching Quiz, and in lower than a minute, you’ll know the right power coaching program for you. Click on right here to test it out.)
Again Squat: Advantages
1. It trains a number of main muscle teams.
The again squat is a singular train in that it trains nearly each main muscle group in your physique, excluding your arms, chest, and shoulders.
Particularly, it helps develop your quadriceps, hamstrings, glutes, erector spinae, latissimus dorsi, trapezius, calves, and abs.
2. It improves athletic efficiency.
The again squat improves your athletic efficiency in 3 ways:
- It helps you develop lower-body energy, pace, and power.
- It trains “hip extension” (transferring your thighs away out of your higher physique), which improves your efficiency in any sport that entails operating, leaping, climbing, throwing, sidestepping, and touchdown.
- It helps you construct decrease–physique stability, making you much less liable to harm, to be able to spend extra time competing and fewer time on the sidelines.
3. It means that you can elevate heavy weights.
Typically talking, the extra weight you elevate, the extra power and muscle you’ll achieve.
The again squat means that you can use a lot heavier weights than most different workouts and causes higher activation of many “supporting” muscle teams, which makes it a unbelievable solution to construct whole-body muscle, power, and coordination.
It additionally means that you can progress repeatedly, which is one of the best ways to maximise the muscle- and strength-building advantages of weightlifting.
Again Squat: Muscle tissues Labored
The principle muscle tissues labored by the again squat are the . . .
It additionally trains your lats, traps, calves, and abs to a lesser diploma, too.
Right here’s how the muscle tissues labored by the again squat look in your physique (sans the abs):
Again Squat: Kind
The easiest way to study tips on how to again squat is to separate the train into three components: arrange, descend, and squat.
Step 1: Set Up
Modify the hooks in an influence rack or squat rack so the bar is on the top of your midchest like this:
In case your squat rack has security arms or bars, set them to concerning the top of your midthigh. Load the bar together with your desired quantity of weight (or not, if the bar alone is sufficient).
Face the bar so you’ll be able to stroll it out backward. Don’t ever stroll the bar out ahead, as making an attempt to rerack it by strolling backward is harmful. Get below the bar and place the bar in your again.
There are two methods to do that:
- Utilizing the high-bar place.
- Utilizing the low-bar place.
A high-bar squat has the bar resting instantly on the higher traps, whereas a low-bar place has the bar resting between the higher traps and rear deltoids.
Right here’s how they appear:
Each strategies are appropriate, however most individuals will discover themselves stronger after they use the low-bar again squat as a result of it means that you can higher leverage your massive leg muscle tissues. That stated, some folks discover the low-bar again squat uncomfortable for his or her shoulders or wrists and naturally favor the high-bar again squat.
Should you’re new to the again squat, I like to recommend you begin with the low-bar again squat and solely change to the high-bar again squat if it’s too uncomfortable.
Upon getting the bar in your most popular place, grip the bar together with your palms going through ahead, thumbs on high of or wrapped across the bar, and your arms about 4-to-8 inches wider than shoulder-width aside.
Holding your palms on the bar, place your toes beneath it a little bit wider than shoulder-width aside. Then, push your torso below and up towards the underside of the bar, sliding your again up till the bar rests towards the again of your shoulders. Pull your shoulder blades collectively and all the way down to create a little bit “shelf” out of the bony protrusions of your shoulder blades, after which maneuver your torso so the bar nestles into this shelf.
You might have to slim or widen your grip to seek out the proper place. The burden of the bar ought to be resting nearly fully in your again muscle tissues, not in your arms or in your backbone.
Unrack the bar by standing up and taking one step again with every foot (separately). Modify your toes in order that they’re a little bit wider than shoulder-width aside and level your toes out about 20-to-25 levels (round one and eleven o’clock).
The burden ought to really feel evenly balanced over the center of your toes, not primarily over your toes or your heels.
Right here’s what you need to seem like from the back and front:
Step 2: Descend
Take a deep breath into your abdomen, push your chest out, brace your abs, and sit down by pushing your hips backward and bending your knees on the similar time. Hold sitting down till your thighs are parallel to the ground or barely decrease.
Right here’s how you need to have a look at the underside of the again squat:
Step 3: Squat
Begin the ascent by driving your toes into the ground, making certain your shoulders transfer upward on the similar charge as your hips—a mirror picture of what you probably did throughout the descent. About midway up, push your hips ahead and beneath the bar to return to the beginning place.
Right here’s the way it ought to look whenever you put all of it collectively:
The Finest Again Squat Exercise for Power and Hypertrophy
Right here’s an efficient leg exercise that prioritizes the again squat and in addition contains different workouts that practice all your lower-body muscle tissues:
- Barbell Again Squat: 3 units of 4-to-6 reps with 2-to-3 min relaxation
- Romanian Deadlift: 3 units of 4-to-6 reps with 2-to-3 min relaxation
- Leg Press: 3 units of 6-to-8 reps with 2-to-3 min relaxation
- Hamstring Curl: 3 units of 8-to-10 reps with 2-to-3 min relaxation
The Finest Again Squat Alternate options
1. Entrance Squat
Analysis exhibits that the entrance squat trains the quads about as successfully because the again squat, even whenever you use as much as 20% much less weight. What’s extra, the entrance squat additionally locations much less compressive forces in your knees and decrease again, which make it a very good different to again squats for individuals who have knee or again points.
2. Bulgarian Cut up Squat
Analysis exhibits that the Bulgarian break up squat is a superb train on your complete decrease physique. As a result of the Bulgarian break up squat trains only one leg at a time, it’s notably helpful for figuring out and night out any muscle or power imbalances you might need, too.
2. Dumbbell Again Squat
The again squat with dumbbells trains your decrease physique in an identical solution to the barbell again squat—the one distinction is you maintain dumbbells by your sides fairly than place a barbell in your again.
The dumbbell again squat works properly in the event you don’t have a barbell (as throughout dwelling exercises), however it could actually really feel awkward as soon as the weights get heavy, which is why you’ll typically get extra mileage out of the barbell variation.
3. Security Bar Squat
The security bar squat is a squat variation that entails utilizing a security squat bar—a particular type of cambered barbell with handles and pads on your again and shoulders.
The protection bar squat is less complicated in your shoulders and decrease again than the again squat, which makes it a very good again squat different when you have poor shoulder mobility or lower-back points that make performing the again squat uncomfortable. That stated, the security bar squat doesn’t practice your decrease physique and abs in addition to the again squat, making the common again squat higher for gaining muscle and power general.
5. Goblet Squat
Analysis exhibits that the goblet squat is an efficient train for coaching all your lower-body muscle, and notably your quads. Since you maintain the load in your arms fairly than throughout your shoulders, it’s additionally simpler in your again than different squat variations.
Sadly, you’ll be able to’t elevate as a lot weight with the goblet squat as you’ll be able to with the again squat, making the train much less efficient for gaining muscle and power.
FAQ #1: What’s the world report again squat?
The heaviest squat ever carried out at an officiated occasion is 1,311 kilos (~595 kilograms), which was carried out by Nathan “Tractor” Baptist in 2021.
Whereas it’s undoubtedly not trigger to low cost this effort, Baptist’s report was set whereas sporting a number of items of supportive tools that helped him squat such a howling weight.
Some folks additionally query whether or not it is a respectable again squat world report as a result of footage of the feat makes it look as if Baptist didn’t squat deep sufficient (his hip crease didn’t go under his knee joint), however the choose on the occasion dominated that he hit the required depth for the elevate to rely.
The again squat world report for a “uncooked” weightlifter (a weightlifter who solely makes use of a belt, chalk, wrist wraps, and knee sleeves) is 1,080 kilos (490 kilograms), set by Ray Williams.
FAQ #2: Why does my decrease again damage after I squat?
Listed here are three possible causes and a few tips about tips on how to repair them:
- You’re utilizing incorrect method: There are numerous methods you’ll be able to mess up again squat method and put undue stress in your backbone. Happily, the repair is straightforward: use the knowledge on this article to study correct again squat type and persist with it. (A typical mistake is letting your chest fall ahead, placing your lower-back in a compromised place.)
- You’re not versatile sufficient: It’s frequent for folks with poor hamstring and ankle mobility to spherical their again after they attain the underside of the squat, which might trigger again ache or result in an harm. The easiest way to treatment that is to enhance your lower-body mobility utilizing the knowledge on this article:
Easy methods to Enhance Flexibility and Mobility for Squatting - You may have a preexisting lower-back harm: When you have a preexisting harm that makes again squatting uncomfortable, you may have two choices: cease performing the again squat till your again is absolutely healed, or cease doing the again squat altogether and substitute it with an train that trains your muscle tissues in an identical means however doesn’t damage your again (and in the event you take an prolonged break, you’ll be able to at all times attempt to again squat once more later—it’s uncommon that somebody has to surrender the again squat eternally).
FAQ #3: What are the greatest squat alternate options for a nasty again?
Should you undergo from again squat again ache and wish to substitute the again squat for an alternate that trains the identical muscle tissues however doesn’t put as a lot pressure in your decrease again, both use the again squat alternate options given above or use a machine train just like the hack squat or leg press.
FAQ #4: Goblet Squat vs. Again Squat: Which is healthier?
It relies upon.
The again squat means that you can elevate heavy weights safely, which implies it’s typically higher for constructing muscle and gaining power.
That stated, the goblet squat is less complicated to study and means that you can elevate weights which are lighter than a barbell (which is perhaps too heavy whenever you first begin weightlifting), making it extra appropriate for newcomers.
FAQ #5: Security Bar Squat vs. Again Squat: Which is healthier?
It relies upon.
Most individuals can elevate extra weight on the again squat than the security bar squat and the again squat trains extra muscle tissues than the security bar squat, which implies the again squat is usually higher for constructing muscle and gaining power.
The protection bar squat has a number of distinctive benefits, although.
It’s kinder to your shoulders and decrease again than the again squat and it makes “hitting depth” (getting your hip under the peak of your knee joint on the backside of the squat) simpler. This implies the security bar squat is a viable squat variation for folks with shoulder and decrease again points or poor mobility.
FAQ #6: Hack Squat vs. Again Squat: Which is healthier?
It relies upon.
The hack squat and again squat are each efficient workouts for coaching all of the muscle tissues of the legs, although the again squat is probably going higher at coaching stabilizer muscle tissues throughout your complete physique and secondary muscle teams such because the decrease again, and should have extra carryover to different athletic endeavors.
That stated, some folks lack the mobility to carry out the again squat correctly, or can’t carry out the again squat due to preexisting accidents that make it unsafe to position heavy masses on their again.
For these folks, the hack squat is a greater possibility, at the least till they develop the mobility to carry out the again squat with correct type or get better from the harm that makes squatting uncomfortable.
Typically, there’s no cause to decide on simply certainly one of these workouts, although. The very best resolution for most individuals is to incorporate each workouts in your program.
A great way to do that is to start out your leg exercise with the again squat, then carry out the hack squat later in your exercise when supporting muscle tissues like your decrease again are bushed, however your legs can in all probability handle one other few units.
(That is additionally the strategy I like to recommend in my health books for males and girls).
FAQ #7: Is the Smith machine again squat a very good again squat different?
The Smith machine again squat isn’t as efficient at creating your lower-body muscle tissues because the barbell again squat, but it surely’s a workable again squat different in the event you don’t have entry to a barbell, you’re working round an harm, otherwise you merely don’t wish to do the barbell model.
FAQ #8: Which dietary supplements will increase my again squat efficiency?
No dietary supplements will add 20 kilos to your again squat in a single day, however the best ones will help you carry out at your greatest (and in the event you’d like particular recommendation about precisely what dietary supplements to take to achieve your health objectives, take the Legion Complement Finder Quiz).
Listed here are one of the best dietary supplements for supporting your again squat exercises:
- 0.8-to-1.2 grams of protein per pound of physique weight per day. This supplies your physique with the “constructing blocks” it must construct and restore muscle tissue and enable you to get better out of your exercises. If you’d like a clear, handy, and scrumptious supply of protein, strive Whey+ or Casein+.
- 3-to-5 grams of creatine per day. This can increase muscle and power achieve, enhance anaerobic endurance, and cut back muscle harm and soreness out of your exercises. If you’d like a 100% pure supply of creatine that additionally contains two different elements that may assist increase muscle progress and enhance restoration, strive Recharge.
- One serving of Pulse per day. Pulse is a 100% pure pre-workout drink that enhances vitality, temper, and focus; will increase power and endurance; and reduces fatigue. You may also get Pulse with caffeine or with out.
+ Scientific References
- Coratella, G., Tornatore, G., Caccavale, F., Longo, S., Esposito, F., & Cè, E. (2021). The Activation of Gluteal, Thigh, and Decrease Again Muscle tissues in Completely different Squat Variations Carried out by Aggressive Bodybuilders: Implications for Resistance Coaching. Worldwide Journal of Environmental Analysis and Public Well being, 18(2), 1–11. https://doi.org/10.3390/IJERPH18020772
- Myer, G. D., Kushner, A. M., Brent, J. L., Schoenfeld, B. J., Hugentobler, J., Lloyd, R. S., Vermeil, A., Chu, D. A., Harbin, J., & McGill, S. M. (2014). The again squat: A proposed evaluation of useful deficits and technical components that restrict efficiency. Power and Conditioning Journal, 36(6), 4. https://doi.org/10.1519/SSC.0000000000000103
- Krause Neto, W., Soares, E. G., Vieira, T. L., Aguiar, R., Chola, T. A., Sampaio, V. de L., & Gama, E. F. (2020). Gluteus Maximus Activation throughout Frequent Power and Hypertrophy Workouts: A Systematic Overview. Journal of Sports activities Science & Drugs, 19(1), 195. /pmc/articles/PMC7039033/
- Kirkpatrick, J., & Consolation, P. (2013). Power, energy, and pace qualities in english junior elite rugby league gamers. Journal of Power and Conditioning Analysis, 27(9), 2414–2419. https://doi.org/10.1519/JSC.0B013E3182804A6D
- Wisløff, U., Castagna, C., Helgerud, J., Jones, R., & Hoff, J. (2004). Sturdy correlation of maximal squat power with dash efficiency and vertical bounce top in elite soccer gamers. British Journal of Sports activities Drugs, 38(3), 285–288. https://doi.org/10.1136/BJSM.2002.002071
- Seitz, L. B., Reyes, A., Tran, T. T., de Villarreal, E. S., & Haff, G. G. (2014). Will increase in lower-body power switch positively to dash efficiency: a scientific evaluation with meta-analysis. Sports activities Drugs (Auckland, N.Z.), 44(12), 1693–1702. https://doi.org/10.1007/S40279-014-0227-1
- Delgado, J., Drinkwater, E. J., Banyard, H. G., Haff, G. G., & Nosaka, Okay. (2019). Comparability Between Again Squat, Romanian Deadlift, and Barbell Hip Thrust for Leg and Hip Muscle Actions Throughout Hip Extension. Journal of Power and Conditioning Analysis, 33(10), 2595–2601. https://doi.org/10.1519/JSC.0000000000003290
- Behrens, M. J., & Simonson, S. R. (2011). A comparability of the varied strategies used to reinforce dash pace. Power and Conditioning Journal, 33(2), 64–71. https://doi.org/10.1519/SSC.0B013E318210174D
- Achalandabaso-Ochoa, A., Aibar-Almazán, A., Martínez-Amat, A., Pecos-Martín, D., Vidal-Aragón, G., Calderón-Corrales, P., Acuña, Á., & Gallego-Izquierdo, T. (2020). Results of a Gluteal Muscle tissues Particular Train Program on the Vertical Bounce. Worldwide Journal of Environmental Analysis and Public Well being, 17(15), 1–11. https://doi.org/10.3390/IJERPH17155383
- Bartlett, J. L., Sumner, B., Ellis, R. G., & Kram, R. (2014). Exercise and features of the human gluteal muscle tissues in strolling, operating, sprinting, and climbing. American Journal of Bodily Anthropology, 153(1), 124–131. https://doi.org/10.1002/AJPA.22419
- Plummer, H. A., & Oliver, G. D. (2014). The connection between gluteal muscle activation and throwing kinematics in baseball and softball catchers. Journal of Power and Conditioning Analysis, 28(1), 87–96. https://doi.org/10.1519/JSC.0B013E318295D80F
- Houck, J. (2003). Muscle activation patterns of chosen decrease extremity muscle tissues throughout stepping and slicing duties. Journal of Electromyography and Kinesiology : Official Journal of the Worldwide Society of Electrophysiological Kinesiology, 13(6), 545–554. https://doi.org/10.1016/S1050-6411(03)00056-7
- Struminger, A. H., Lewek, M. D., Goto, S., Hibberd, E., & Blackburn, J. T. (2013). Comparability of gluteal and hamstring activation throughout 5 generally used plyometric workouts. Medical Biomechanics (Bristol, Avon), 28(7), 783–789. https://doi.org/10.1016/J.CLINBIOMECH.2013.06.010
- Escamilla, R. F. (2001). Knee biomechanics of the dynamic squat train. Drugs and Science in Sports activities and Train, 33(1), 127–141. https://doi.org/10.1097/00005768-200101000-00020
- Hartmann, H., Wirth, Okay., & Klusemann, M. (2013). Evaluation of the load on the knee joint and vertebral column with modifications in squatting depth and weight load. Sports activities Drugs (Auckland, N.Z.), 43(10), 993–1008. https://doi.org/10.1007/S40279-013-0073-6
- Nationwide Power and Conditioning Affiliation Journal. (n.d.). N.S.C.A. POSITION PAPER: The Squat Train in Athletic Cond… : Power & Conditioning Journal. Retrieved Could 19, 2022, from https://journals.lww.com/nsca-scj/Quotation/1991/10000/N_S_C_A__POSITION_PAPER__The_Squat_Exercise_in.11.aspx
- T M McLaughlin, T J Lardner, & C J Dillman. (n.d.). Kinetics of the parallel squat – PubMed. Retrieved Could 19, 2022, from https://pubmed.ncbi.nlm.nih.gov/725284/
- Myer, G. D., Brent, J. L., Ford, Okay. R., & Hewett, T. E. (2011). Actual-time evaluation and neuromuscular coaching suggestions methods to stop ACL harm in feminine athletes. Power and Conditioning Journal, 33(3), 21. https://doi.org/10.1519/SSC.0B013E318213AFA8
- Miletello, W. M., Beam, J. R., & Cooper, Z. C. (2009). A biomechanical evaluation of the squat between aggressive collegiate, aggressive highschool, and novice powerlifters. Journal of Power and Conditioning Analysis, 23(5), 1611–1617. https://doi.org/10.1519/JSC.0B013E3181A3C6EF
- Yavuz, H. U., Erdağ, D., Amca, A. M., & Aritan, S. (2015). Kinematic and EMG actions throughout back and front squat variations in most masses. Journal of Sports activities Sciences, 33(10), 1058–1066. https://doi.org/10.1080/02640414.2014.984240
- Gullett, J. C., Tillman, M. D., Gutierrez, G. M., & Chow, J. W. (2009). A biomechanical comparability of front and back squats in wholesome educated people. Journal of Power and Conditioning Analysis, 23(1), 284–292. https://doi.org/10.1519/JSC.0B013E31818546BB
- Jones, M. T., Ambegaonkar, J. P., Nindl, B. C., Smith, J. A., & Headley, S. A. (2012). Results of unilateral and bilateral lower-body heavy resistance train on muscle exercise and testosterone responses. Journal of Power and Conditioning Analysis, 26(4), 1094–1100. https://doi.org/10.1519/JSC.0B013E318248AB3B
- Slater, L. V., & Hart, J. M. (2017). Muscle Activation Patterns throughout Completely different Squat Methods. Journal of Power and Conditioning Analysis, 31(3), 667–676. https://doi.org/10.1519/JSC.0000000000001323
- Hecker, Okay. A., Carlson, L. A., & Lawrence, M. A. (2019). Results of the Security Squat Bar on Trunk and Decrease-Physique Mechanics Throughout a Again Squat. Journal of Power and Conditioning Analysis, 33 Suppl 1, S45–S51. https://doi.org/10.1519/JSC.0000000000002912
- Collins, Okay. S., Klawitter, L. A., Waldera, R. W., Mahoney, S. J., & Christensen, B. Okay. (2021). Variations in Muscle Exercise and Kinetics Between the Goblet Squat and Landmine Squat in Males and Ladies. Journal of Power and Conditioning Analysis, 35(10), 2661–2668. https://doi.org/10.1519/JSC.0000000000004094
- Schwanbeck, S., Chilibeck, P. D., & Binsted, G. (2009). A comparability of free weight squat to Smith machine squat utilizing electromyography. Journal of Power and Conditioning Analysis, 23(9), 2588–2591. https://doi.org/10.1519/JSC.0B013E3181B1B181
- Stokes, T., Hector, A. J., Morton, R. W., McGlory, C., & Phillips, S. M. (2018). Latest Views Concerning the Function of Dietary Protein for the Promotion of Muscle Hypertrophy with Resistance Train Coaching. Vitamins, 10(2). https://doi.org/10.3390/NU10020180
- Department, J. D. (2003). Impact of creatine supplementation on physique composition and efficiency: a meta-analysis. Worldwide Journal of Sport Diet and Train Metabolism, 13(2), 198–226. https://doi.org/10.1123/IJSNEM.13.2.198
- Eckerson, J. M., Stout, J. R., Moore, G. A., Stone, N. J., Iwan, Okay. A., Gebauer, A. N., & Ginsberg, R. (2005). Impact of creatine phosphate supplementation on anaerobic working capability and physique weight after two and 6 days of loading in women and men. Journal of Power and Conditioning Analysis, 19(4), 756–763. https://doi.org/10.1519/R-16924.1
- Bassit, R. A., Pinheiro, C. H. D. J., Vitzel, Okay. F., Sproesser, A. J., Silveira, L. R., & Curi, R. (2010). Impact of short-term creatine supplementation on markers of skeletal muscle harm after strenuous contractile exercise. European Journal of Utilized Physiology, 108(5), 945–955. https://doi.org/10.1007/S00421-009-1305-1