Workouts · Cardio
HIIT Express in 15
Four movements, fifteen minutes, zero excuses — the shortest honest hard workout in the library.
15 minintermediateno equipmentcardiovigorous
Why it works. When time is the enemy, brief vigorous intervals still bank real aerobic benefit.
Warm-up
Easy jog or march in place — 60s
Gentle jumping jacks, building — 60s
The workout
- jack jump — 3 × 30srest 30s
- jump squat — 3 × 15srest 30s
- mountain climber — 3 × 30srest 30s
- star jump — 2 × 20srest 40s
Cool-down
Slow walk in place, breathing down — 60s
Listen to your body. General fitness information, not personalized medical advice. Mild effort is normal; sharp, sudden, or worsening pain is not — stop, and if pain persists, consider speaking with a healthcare professional.
More cardio sessions
Do it guided, in HealthApp
Set-by-set timers, demo loops for every movement, automatic rest, weight tracking, and personal bests.