If you don't feel that you're working your muscles during certain exercises, there could be a few reasons.
You're doing the exercises too quickly
The most common mistake is doing the exercise too quickly. This is the case for abdominal exercises, kick-backs or glute bridges. We suggest taking one second to do the movement, and one second to release it.
You're using poor technique
Often, you need to master the proper technique in order to feel all the effects. Make sure to review the instructions on how to do the exercise correctly and take the time to practice it before starting your workout. You can practice in front of a mirror to help you correct your posture.
You're not contracting your muscles
To intensify the exercise, remember to deliberately contract (but not force) the muscles you're working as you move.