Ashtanga Yoga
A standard set of asanas with a strong focus on breath, moral and ethical guidelines, as well as internal mental space.
Ashtanga yoga focuses on muscle training and develops physical strength. Practicing Ashtanga rejuvenates your body, making it stronger, toned, more flexible and controlled. The opening series includes lots of contortion-esque poses and many of them require core and arm strength.
It is known to be strenuous, so it is great for athletes and people that are looking for a good workout. Ashtanga focuses on breath, poses, and meditation. A regular yoga practice can improve your flexibility, breathing, and balance.