Gym bay · 10-20-30
10-20-30 hallway
Bangsbo. 30 easy / 20 moderate / 10 honest. Three 5-min blocks.
Treadmill, 10-20-30.
Other venue: Home floor
Inputs
- Treadmill or track
- Timer
Rounds
- 30 jog, 20 run, 10 near-sprint. Blocks of five. Walk 2:00 between.
Do not flatten this into a steady 5k.
Chest pain, unusual shortness of breath, dizziness, or a known uncleared heart / metabolic / renal condition: stop. Get clearance. Unsupervised HIIT is not cardiac rehab.