Home » Group Exercise » Top 3 Exercises Done Wrong in Group Exercise

By Tyler Valencia, MS

I’m going to preface this blog post by stating that I have and still do teach group exercise, and that I believe group exercise can be great for all fitness levels (Yes, ALL lifters!). With that out of the way, the following three exercises are the top exercises that I believe are performed incorrectly in group exercise. This could be a combination of the experience of the instructor, but also the fact that there are often packed classes and not every participant is instructed to fix their form. It doesn’t mean group exercise is bad, but optimizing movement will increase muscle development and prevent injury due to poor mechanics.

As many fitness professionals already know, during the initial months of an exercise program are when novice exercisers are going through neuromuscular adaptations and also cognitive changes. When starting an exercise program, one of the worst events that can happen is an injury. An injury can not only deter the exerciser from creating positive habits, but also change their outlook on the type of movement they performed. For example, a knee injury might deter an exerciser from performing squats, which in reality is one of the best ways to strengthen the lower extremities and is a part of many exercise programs. While more and more group exercise programs are including modifications, the time showing modifications deters from the overall class experience.

Please feel free to leave your thoughts in the comment section and add exercises that you think are undervalued or performed poorly.

  1. Straight-Leg Deadlift

In my opinion, the straight-leg deadlift is one of the fundamental movements to building a strong posterior chain. Being able to hold the bend-over position efficiently allows the exerciser to perform bent-over rows, tricep kickbacks and can be eventually progressed to a deadlift. Due to it’s hip dominant nature, the straight-leg deadlifts is also one of the best exercises to add to a hamstring injury-prevention routine (Bourne et al., 2017).

Getting group exercise participants to buy into this exercise is often the hardest due to the belief that it will “hurt their back,” but this movement can build core strength to prevent a back injury. Another common barrier to this exercise is that individuals are very “squat dominant” and mechanically cannot figure out how to “hinge” or “fold” from their hips. Too often we find exercisers squatting into this movement and loading the quadriceps instead of the hamstrings.

Suggested Cues:

  1. Start with the feet hip-width apart. Slightly bend the knees (to prevent locking them out) and create abdominal pressure.
  2. Hinge or fold at the hips till the hamstrings have been optimally loaded. Stand up and re-set the movement.

Common Errors:

  • Locking out the knees. To fix, have the participant stand up and re-cue the movement with their knees slightly bent.
  • Excessive spinal flexion. To fix, have the participant stand up, create abdominal pressure and think about keeping a “tall chest” while performing the movement. This error might also be caused by a posterior pelvic tilt. If so, teaching the participant how to move from their hips could resolve the issue.
  • Too wide of a stance. To fix, have the participant stand up and reposition their feet under or to the outside of their hips (depends on the shape of their hips and injury history).

  1. Kettlebell Swing

I think the kettlebell swing could be the exercise that discredits group exercise in the eyes of extreme exercisers. In my opinion, the debate lies in how many individuals perform a squat-swing and eliminate the “purpose” developed by kettlebell purist. By squatting and then essentially doing a front raise, the motion is altered and thus the purpose. Kettlebell purists teach the kettlebell swing as a hip hinge that loads the posterior chain, and helps strengthen the core and hip musculature. Other benefits of kettlebell swings include high amounts of hamstring activity in high degrees of hip flexion, peak gluteal activation at near hip extension, and with moderate loads this movement produces a similar power output to jump squats (Beardsley & Contreras, 2014). In this form of the exercise, using the momentum of the kettlebell and also the hip motion explained above are important aspects of the movement. While there are varying schools of thought on how to “finish” a kettlebell swing (knee lock-out or not), both can agree that this form of the exercise is great for the hips, low back musculature and hamstrings.

Kettlebells have also become a big part of commercial fitness. Due to their shape, kettlebells can be used in a similar fashion to dumbbells to perform presses (chest or shoulder), farmers walks, squats or deadlifts. Kettlebells are also great in mobility work with halos or additional weight during a cossaks squat.

Suggested Cues:

  1. Start with the fingers gripping the handle of the kettlebell and a neutral wrist. Foot stance should be between hip-width and shoulder-width depending on the goal of the swing.
  2. To start, have the participant reach between their thighs, hinge from their hips and drive forward (hip extension) to propel the kettlebell in-front of the body.
  3. Ideally the kettlebell should go no higher than eye-level.
  4. During the descent, keep the kettlebell high as it passes through the legs to avoid excessive lower lumbar loading.

Common Errors:

  • “Death Gripping” the kettlebell handle. Too much wrist flexion while holding the kettlebell will increase fatigue in the forearm, and take away from goal of swinging a kettlebell. To fix, have participants focus on gripping with their fingers which will also build grip strength.
  • Squatting the kettlebell. This is very common with novice kettlebell lifters. To fix, have participants learn how to do a straight-lift deadlift to load the posterior musculature. The motion on the descent phase is a hip hinge and not a squat.

  1. Mountain Climbers

While fundamentally a participant should be able to hold a plank before performing a mountain climber, group exercise is not about program progression or individualization. There is nothing wrong with that, but it’s important that group participants understand the cues of this exercise. In my professional opinion, mountain climbers are one of the exercises most affected by the “no pain no gain” mindset that forces some group participants to exercise as hard as they can without regard to technique. When fatigue sets in, participants lose abdominal pressure and quickly go into spinal flexion. Now adding in the dynamic pounding from the lower extremities, and you have a quick route to lower back pain. Shimamura et al. (2015) stated “faulty movement patterns can further perpetuate irritation to the surrounding tissues of the hip and low back which can occur with increased frequency of accessory and physiologic movements seen with poor lumbo-pelvic control” (pp. 2). Stressing the importance of each cue during the mountain climber can not only help strengthen the “core,” but also have compounding effects which benefit each class participant.

Suggested Cues:

  1. Start by having the participant set themselves up in a plank (forearm or arms extended). Cue the participant to first focus on creating abdominal pressure.
  2. Next, have the participant work on driving their knees while keeping maintaining the structure of the plank.

Common Errors:

  • Having the hands too far in-front of the shoulders. Having the hands too high above the shoulders will start to create excessive strain on the shoulders, which could cause the shoulders to fatigue first. To fix, have the participant start with their hands underneath their shoulders.
  • Excessive lower lumbar rounding or spinal flexion. Either movement error can cause unwanted pressure on the spine. To fix, have the participant focus more on knee drives and not bouncing in the hips.


As mentioned in the introduction, group exercise is great! It’s cost-effective and promotes healthy behaviors to individuals wanting to improve their fitness level. As of late 2017 there are no set accreditation standards for group exercise education, and therefore much of the entry requirements fall upon the gym doing the hiring. There is only one direction (up) that group exercise is going and with time, group exercise practices and formats will become more technical and efficient.


Beardsley, C., & Contreras, B. (2014). The Role of Kettlebells in Strength and Conditioning: A Review of the Literature. Strength & Conditioning Journal (Lippincott Williams & Wilkins)36(3), 64-70.

Bourne, M., Timmins, R., Opar, D., Pizzari, T., Ruddy, J., Sims, C., Williams, M. & Shield, A. (2017). An evidence-based framework for strengthening exercises to prevent hamstring injury. Journal of Sports Medicine, 1-17.

Shimamura, K., Cheatham, S., Chung, W., Farwel, D., De la Cruz, F., Goetz, J., & … Powers, D. (2015). Regional interdependence of the hip and lumbo-pelvic region in division II collegiate level baseball pitchers: a preliminary study. International Journal of Sports Physical Therapy10(1), 1-12.

Tyler Valencia is the President of KIPS. While working for a Southern California online education company he started his first business, Time 2 Train Fitness which specialized in bootcamp and personal training. Time 2 Train Fitness went on to receive the distinction of 3X Best Bootcamp and 2X Best Personal Trainer with the Long Beach Press Telegram. Before founding KIPS, Tyler was the Vice President of the National Council for Certified Personal Trainers (NCCPT) & Smart Fitness.

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