Flex your wits

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Across
  1. 4. A period of sleep or relaxation. (4 letters)
  2. 8. A practice where an individual uses a technique to train attention and awareness. (10 letters)
  3. 9. The quality of being physically strong. (8 letters)
  4. 10. A low-impact exercise that lengthens and relaxes muscles. (7 letters)
  5. 12. The ability of an organism to exert itself and remain active for a long period of time. (9 letters)
  6. 13. The essential practice of replenishing the body's water levels. (9 letters)
  7. 14. A form of high-intensity interval training (HIIT) consisting of eight rounds of 20-second efforts. (6 letters)
  8. 16. The macronutrient essential for building and repairing muscle. (7 letters)
  9. 18. The quality or state of being in good health, especially as an actively pursued goal. (8 letters)
  10. 19. A state of active, open attention on the present moment. (11 letters)
Down
  1. 1. The process of providing the body with the food necessary for health and growth. (9 letters)
  2. 2. An even distribution of weight enabling someone or something to remain upright and steady. (7 letters)
  3. 3. An ancient discipline of postures, breathing, and meditation. (4 letters)
  4. 5. A foundational strength-training exercise targeting the quadriceps and glutes. (5 letters)
  5. 6. A low-impact form of exercise that aims to strengthen muscles while improving postural alignment and flexibility. (7 letters)
  6. 7. The way a person holds their body when standing or sitting. (7 letters)
  7. 9. A short, all-out burst of speed. (6 letters)
  8. 11. Any form of exercise that raises your heart rate and improves circulation. (6 letters)
  9. 15. The calming practice of inhaling and exhaling in a controlled manner. (9 letters)
  10. 17. The physical and mental capacity to be active. (6 letters)