Exercise Enthusiast's Crossword Challenge

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Across
  1. 1. - High-impact exercises like jumping or bounding (11 letters).
  2. 6. - Exercises that involve static muscle contractions (10 letters).
  3. 7. - A step forward or backward with one leg, bending at the knee (5 letters).
  4. 8. - The ability of joints to move through their full range of motion (11 letters).
Down
  1. 2. - A range of exercises in one's routine (10 letters).
  2. 3. - Hand-held weight used for resistance training (8 letters).
  3. 4. - Stamina and staying power during workouts (9 letters).
  4. 5. - Periodic high-intensity training alternated with low-intensity recovery (8 letters).