Yoga nidra or yogic sleep is a state of consciousness between waking and sleeping, like the "going-to-sleep" stage, typically induced by a guided meditation. There is evidence that yoga nidra helps relieve stress.

Essentially, yoga therapy is the application of yoga practices to alleviate physical and mental health conditions with the view of promoting self-care and encouraging overall well-being.

https://www.hopkinsmedicine.org/health/wellness-and-prevention/9-benefits-of-yoga

1. Yoga improves strength, balance and flexibility. Slow movements and deep breathing increase blood flow and warm up muscles, while holding a pose can build strength.

2. Yoga helps with back pain relief. Yoga is as good as basic stretching for easing pain and improving mobility in people with lower back pain. The American College of Physicians recommends yoga as a first-line treatment for chronic low back pain.

3. Yoga can ease arthritis symptoms. Gentle yoga has been shown to ease some of the discomfort of tender, swollen joints for people with arthritis, according to a Johns Hopkins review of 11 recent studies.

4. Yoga benefits heart health. Regular yoga practice may reduce levels of stress and body-wide inflammation, contributing to healthier hearts. Several of the factors contributing to heart disease, including high blood pressure and excess weight, can also be addressed through yoga.

5. Yoga relaxes you, to help you sleep better. Research shows that a consistent bedtime yoga routine can help you get in the right mindset and prepare your body to fall asleep and stay asleep.

6. Yoga can mean more energy and brighter moods. You may feel increased mental and physical energy, a boost in alertness and enthusiasm, and fewer negative feelings after getting into a routine of practicing yoga.

7. Yoga helps you manage stress.  According to the National Institutes of Health, scientific evidence shows that yoga supports stress management, mental health, mindfulness, healthy eating, weight loss and quality sleep.

8. Yoga connects you with a supportive community.  Participating in yoga classes can ease loneliness and provide an environment for group healing and support. Even during one-on-one sessions loneliness is reduced as one is acknowledged as a unique individual, being listened to and participating in the creation of a personalized yoga plan.

9. Yoga promotes better self-care.  Scientific Research on Yoga Benefits  The U.S. military,

A general rule of thumb is that yoga is best when practiced between three and five times per week. As you ease your way into a consistent practice schedule, that's a good goal to aim for! Over time, you might find that your body can handle five or six sessions each week.

In general, yoga practice is recommended in the morning or the early evening. A morning yoga session can be quite active and consist of a full practice. Always finish with Savasana (Corpse Pose), no matter what time of day or season your practice. You may choose to do a different type of practice in the afternoon.

The Sun Salutation, or Surya Namaskara (SOOR-yuh nah-muh-SKAR-uh), is a series of poses performed in a sequence to create a flow of movement. ... Sun Salutations build heat in the body and are often used as warm-up sequences for a yoga practice.

Ashtanga Yoga is a style of yoga as exercise created by K. Pattabhi Jois during the 20th century, often promoted as a modern-day form of classical Indian yoga. He claimed to have learnt the system from his teacher, Tirumalai Krishnamacharya. The style is energetic, synchronising breath with movements. 

Ashtanga yoga is a powerful tool to tune the body. It improves focus, balance and coordination. A swift and intense set of asanas instils a better sense of rhythm and increases your awareness of the movement and flow of your body.

A vinyasa is a smooth transition between asanas in styles of modern yoga as exercise such as Vinyasa Krama Yoga, Ashtanga Vinyasa Yoga and Bikram Yoga, especially when movement is paired with the breath.

Because the challenging poses are done in quick succession, Vinyasa yoga helps build muscle strength and endurance while improving your fitness.

Power Vinyasa Flow Yoga is a powerful, energetic form of yoga where students fluidly move from one pose to the next while connecting their breathing to their movements. This type of yoga is taught in a heated studio which makes it a vigorous and revitalizing form of physical fitness.

Power yoga, which is also known as Vinyasa yoga, is a fast-paced style of yoga that's focused on building strength and endurance. ... Although it requires mindfulness and focus on your breathing, power yoga is more dynamic than meditative forms of yoga, and provides a good cardio and strength-training workout.

Vinyasa is a style of yoga characterized by stringing postures together so that you move from one to another, seamlessly, using breath. Commonly referred to as “flow” yoga, it is sometimes confused with “power yoga“. Vinyasa classes offer a variety of postures and no two classes are ever alike.

Vinyasa Flow helps build and maintain strong bones, muscles and connective tissue to maintain a high metabolism, healthy posture, and an active and alive body. ... The physical work of Vinyasa Flow yoga ensures that we will have the strength, balance and function to maintain health lives into our senior years.