伸展间隔计算器公式

## Stretching During Prolonged Sitting

Research recommends a movement break every 30-45 minutes of sitting.

**Stretches Needed = Sitting Minutes / 45**

### Recommended Stretches

1. Neck rolls (30 seconds)
2. Shoulder shrugs (30 seconds)
3. Seated spinal twist (30 seconds each side)
4. Hip flexor stretch (30 seconds each side)
5. Wrist circles (30 seconds)

Total: about 3 minutes per session.

计算示例

8 hours sitting, 3 minutes per stretch session.

  1. Stretches needed = ceil(480 / 45) = 11 sessions
  2. Total stretch time = 11 x 3 = 33 minutes
  3. Stretch every = 480 / 11 = 44 minutes