HIIT during ovulation
Ever notice some HIIT sessions feel easy and others feel like death? It's not random. It's your cycle.
The hormone setup
Around day 12-16, estrogen is peaking and you get a small testosterone bump from the LH surge. This combination increases power output, shortens reaction time, and raises your pain threshold.
Your body temperature is still in its lower range (pre-progesterone rise), which means you can handle high-intensity work without overheating as quickly.
Why HIIT hits different this week
Your muscles contract harder. Your cardiovascular system responds faster. You can push closer to your true VO2 max.
A study from the University of Jyväskylä found that high-intensity training during the follicular/ovulation phase produced better aerobic improvements than the same training in the luteal phase. Same workouts. Different hormonal backdrop. Different results.
Best HIIT formats for ovulation
Tabata: 20s max effort, 10s rest, 8 rounds. Classic and brutal.
Sprint intervals: 30s all-out on bike or rower, 90s recovery, 6-8 rounds.
Metcon: 12-min AMRAP of burpees, kettlebell swings, box jumps. You'll surprise yourself with how many rounds you get this week vs. last week.
The key: go genuinely hard. This is the one week where "give it 100%" actually matches what your body can deliver.
Save HIIT for ovulation, not every week
Most women do 3-4 HIIT sessions per week because their app tells them to. Then they burn out by week 3 and quit.
Better approach: cluster your HIIT around ovulation (2-3 sessions in that 3-5 day window). Do moderate cardio and strength the rest of the month. You get the benefits of HIIT without the burnout. Your body recovers better because you're working with your biology, not against it.
Train with your cycle, not against it
Lune adjusts your workouts to your menstrual cycle automatically. Same program, smarter timing.
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