Intervals and conditioning
Hard intervals are useful. More hard intervals are not always more useful.
Flexbound caps HIIT frequency and duration, credits vigorous minutes toward aerobic work, and keeps intervals away from heavy lower-body lifting when possible.
How the plan is built
How it builds
The planner starts with your practice.
HIIT is scheduled as a real fatigue cost. Sessions stay short, weekly frequency stays capped, and the plan prefers non-lifting days or placement after upper-body training. The remaining easy-cardio target is recalculated instead of stacking everything together.
What shapes the week
- One to two sessions weekly, generally 10–30 minutes
- Vigorous minutes receive evidence-backed aerobic credit
- Interference risk changes placement around lower-body lifting
- Low-impact modes are preferred when recovery is strained
Example, not prescription
A week the planner could produce.
TueLow-impact intervals20 min · vigorous
FriShort intervals15 min · vigorous
SunEasy walkAerobic minutes, conversational
Your version changes with goal, experience, days, session length, equipment, and the other styles selected.
Honest limits
The plan says what this style cannot cover.
- HIIT is not a uniquely superior fat-loss method.
- Hard sessions cannot replace an aerobic base indefinitely.
- A generic video cannot screen cardiovascular risk or movement readiness.
Coming to iOS
HIIT belongs in your training record.
Flexbound builds around the movement you will actually do, then keeps the method, assumptions, and next decision visible.