Leg extension is an exercise usually performed on a lever simulator. You sit on a soft seat and lift the soft crossbar with your feet. The exercise mainly involves the quadriceps muscles of the anterior surface of the thigh — the rectus femoris and the broad thigh muscle. You can use this exercise to increase lower body strength and muscle relief as part of strength training.

You need a healthy spine for many things, from ordinary everyday tasks to the most extreme workouts. Your thoracic spine is designed to stretch out and help you do things like raise your arms above your head, squat, jump, and more.

Unfortunately, many of us lead a sedentary lifestyle, which is why our vertebrae are constantly bending. This means that the spine is rounded and the shoulders are lowered forward.

Hip extension on all fours is an excellent, beginner-friendly exercise for working with the gluteus maximus.

You are preparing for the exercise on all fours, so get on your hands and knees, palms aligned under the shoulders, and knees under the hips, the muscles of the core are tense, and the back is even. This allows you to keep the body as stable as possible when you lift one hip - pull the leg towards the ceiling.

Triceps extension is an isolating exercise that works out the muscles of the back of the shoulder. This muscle, called the triceps, has three parts: long, lateral and medial. They work together to extend the forearm at the elbow joint. The triceps extension exercise is called an isolating exercise because it involves movement in only one joint - the elbow.