Muscle weakness happens when your full effort doesn’t produce a normal muscle contraction or movement. It’s sometimes called reduced muscle strength, muscular weakness, or weak muscles. In plain English, legs feel like “jelly” or “rubber” and even to the point when taking just a few steps can be exhausting or troublesome.

Unfortunately, muscle weakness will happen to all of us at some point in our life. From our 30s onwards, our body composition starts to change - we begin to lose muscle mass, muscle strength and endurance. People who are physically inactive can lose as much as 5% of their muscle mass each decade after age 30. Even people who are active can’t escape the aging process and will experience muscle loss.