The Science
A Pulse150 session is built from four kinds of blocks — athletic, strength, cardio, stretch. Each one does something specific for your body, now and decades from now. Here's the research behind them, in plain English, with an honest label on how solid each claim is — including one common claim that doesn't hold up.
The method
Inside every block, the timer alternates work and recovery, round after round — the same rhythm a boxer moves through rounds, or a runner through intervals. Work, then back off, repeat: that interval is what the clock is for.
The four blocks — athletic, strength, cardio, stretch — are a sensible default order: do the hardest, most explosive work while you're fresh, then lift, flush it out, and cool down. But it's your session. Reorder them, skip the ones you don't want, do a single block. The evidence on session order is loose, and we're not going to pretend there's one right way to train. The clock runs whatever you build.
The first block, and the hardest. High-output work — boxing, intervals, plyometrics — fires up the nervous system and sets the ceiling for everything after it.
Raises your VO₂max
StrongVO₂max is how much oxygen your body can actually use — the single best measure of your endurance.
The long game
The fitness number most tied to staying active, mobile and independent well into your 70s.
Sharpens balance & coordination
ModerateFast footwork and jumps train proprioception — your sense of where your body is in space.
The long game
Falls are what quietly end independence later in life. The balance you build now is what keeps you steady at 75.
Blunts appetite after a hard effort
EmergingGhrelin is the hormone that makes you hungry. A hard session briefly turns it down.
The long game
Appetite control gets harder every decade — a workout that naturally dials hunger down makes staying lean easier for life.
Loaded movement while you're already taxed. Lift after conditioning and you build strength that shows up when you're tired — the kind that carries into real life.
Preserves muscle as you age
StrongSarcopenia is the muscle you steadily lose with age. Lifting is the one intervention proven to slow and even reverse it.
The long game
You lose muscle every year after 30 if you do nothing. This is what lets you carry, climb, and get off the floor at 80.
Strength holds up after conditioning
StrongTraining strength when you are already tired from the athletic block does not cost you the gains — the two do not cancel out.
The long game
Strength you keep when tired is the kind that stays useful for life, not just for a fresh gym set.
Builds bone density
ModerateLoading your skeleton keeps bones dense and strong. The gains are bigger when the weight is genuinely heavy.
The long game
Bone thins silently for decades. Load it now and a stumble at 70 is a bruise, not a broken hip.
Drop the intensity and keep moving. This block flushes the session out and keeps your heart, brain and arteries working. Active recovery, not filler.
Lowers blood pressure & cholesterol
StrongSteady, lower-intensity aerobic work relaxes your arteries and improves your cholesterol numbers over time.
The long game
These are the slow drivers of heart trouble. Bringing them down now is decades of protection, compounding.
Feeds the brain
ModerateCardio raises BDNF, a protein that helps brain cells grow and connect — supporting memory and focus.
The long game
The same protein this raises is tied to slower memory decline. Today’s cardio is a deposit in your future brain.
Linked to younger-looking skin
EmergingEarly research found aerobic exercise thickened the deeper skin layers — a real finding, still preliminary, and cosmetic.
The long game
The anti-aging benefit you can actually see in the mirror — early evidence, but real.
The wind-down. Muscles are warm and the nervous system is settling — the one window where mobility work actually takes. Here is what it is for, and what it is not.
Improves range of motion
StrongRange of motion is how far a joint can travel. Stretching a warm muscle, as the body winds down, safely increases it.
The long game
Stiffness is what makes people "move old." Keep your range now and you still reach, squat and turn freely at 70.
Established in exercise science
Myth: stretching prevents injury & soreness
MythThe most-repeated stretching claim there is — and the evidence disproves it. Stretching does not meaningfully reduce injury risk or next-day soreness. We stretch for range of motion, not as insurance, and we will not pretend otherwise.
The standard
Most apps quietly sell you the stretching-prevents-injury myth. We put it on the page and label it. Every claim here earns its keep — train on real science, not gym folklore.