What happens in your luteal phase
After ovulation, progesterone rises and estrogen has a second smaller peak, then both fall away before your period. That hormonal mix nudges your core temperature up, lifts your resting heart rate, raises perceived effort at the same pace, can fragment sleep, and increases how much fuel you burn at rest. None of it means you are unfit. It means the same workout genuinely costs more this week.
How to train in your luteal phase
Expect higher effort, and judge by feel
Your usual pace may sit at a higher heart rate and feel harder. That is normal. Run to effort rather than chasing the splits you hit two weeks ago, and the work still lands.
Fuel more, especially carbohydrate
The luteal phase raises your energy needs and your body leans more on carbohydrate. Under-fueling here is a fast way to feel terrible. Phaes pairs the plan with phase-aware fueling that adds a little through this stretch.
Protect sleep and cooling
A higher core temperature plus lighter sleep is a rough combination. Cooler rooms, earlier hard sessions, and honest recovery matter more this week than any single workout.
Keep strength, ease the junk
You do not have to write the phase off. Keep meaningful strength work and the quality sessions you can absorb; trim the pointless extra mileage that only adds fatigue.
The late luteal and PMS days
The toughest stretch is usually the few days right before your period, when both hormones bottom out. This is the time to be flexible: move a key session, keep moving easy, and trust that things often lift once the bleed begins. Then your follicular phase window is there to push.
How Phaes handles it for you
You should not have to track all of this by hand. Phaes anchors to your real cycle and reads a short daily check-in, so a rough luteal night gets treated like one, hard work moves to where you can absorb it, and a load guard keeps you from grinding. See cycle syncing workouts.