Ancient yoga refers to the practice and philosophy of yoga that originated in India more than 2,000 years ago. Some of the key features of authentic ancient yoga include:

1. Holistic approach: Ancient yoga was a comprehensive system of physical, mental, and spiritual development, not just a collection of physical postures.
2. Spiritual focus: Yoga was originally seen as a path to spiritual liberation, with the ultimate goal being to attain a state of unity with the divine.
3. Philosophy: Ancient yoga is based on the ancient Indian scriptures known as the Yoga Sutras of Patanjali, which outlines the philosophical principles of yoga and the path to spiritual enlightenment.
4. Meditation: Ancient yoga places a strong emphasis on meditation and breath control, with the aim of calming the mind and promoting inner peace.
5. Ethical guidelines: Ancient yoga also includes ethical guidelines, known as the yamas and niyamas, which outline principles such as non-violence, truthfulness, and non-stealing.

While modern yoga practices have evolved and changed, many traditional yoga schools still maintain the authenticity and depth of ancient yoga, incorporating its philosophical, spiritual, and ethical aspects into their teachings.

Yoga in India and America are similar in many ways but also have some differences.

Similarities:

• Both India and America offer various styles of yoga, ranging from traditional Hatha yoga to more modern and physically demanding styles like Ashtanga or Vinyasa.
• Both countries place an emphasis on the physical, mental, and spiritual benefits of yoga, such as stress reduction, increased flexibility, and improved mental clarity.

Differences:

• In India, yoga is often seen as a way of life, a spiritual practice, and a philosophy, and is deeply ingrained in the culture. In America, while yoga is widely popular, it is often seen as more of a physical fitness activity.
• In India, traditional yoga is taught by a Guru or teacher who has extensive knowledge and experience in the practice. In America, yoga classes are often taught by certified instructors, but the level of experience and knowledge may vary.
• The focus of yoga in India is often on the spiritual and philosophical aspects of the practice, whereas in America, the focus is often more on the physical benefits of yoga.
• The style of yoga practiced in India tends to be more traditional, whereas in America, there is a wider variety of styles, including fusion styles that combine elements of other physical activities.
• The cost of yoga classes can also differ between India and America, with classes in America often being more expensive due to higher overhead costs and the commercialization of yoga.

Overall, both India and America offer unique perspectives and experiences in the practice of yoga, and both offer the opportunity for individuals to improve their physical and mental health through this ancient practice.

There are several negative aspects of American yoga practices that have been criticized by some practitioners and scholars. Some of these include:

1. Cultural appropriation: Yoga has its roots in ancient Indian philosophy and spirituality, and some argue that American yoga practices have often taken elements of yoga out of context, commodifying and commercializing them.
2. Lack of authenticity: Critics argue that many American yoga practices lack the cultural, philosophical, and spiritual depth of traditional yoga and can be seen as shallow or inauthentic.
3. Physical emphasis: American yoga often focuses heavily on physical postures, or asanas, and may neglect other important aspects of yoga, such as meditation and spirituality.
4. Injuries: Improper alignment and overexertion during yoga postures can lead to injury, and some argue that the emphasis on physical achievement in American yoga practices can encourage students to push themselves too far.
5. Commercialization: Yoga has become a multi-billion-dollar industry in the US, with many studios and instructors prioritizing profit over the well-being of students.

These criticisms are not meant to detract from the positive benefits that yoga can bring to people’s lives, but to highlight some potential pitfalls of American yoga practices and the importance of studying and respecting the cultural roots of yoga.