If You Only Had Time for One Exercise…

People ask this one constantly, usually somewhere between "I don't have time to work out" and "just give me the cheat code." And look, I get it. Nobody's got 90 minutes a day to spend on a perfectly periodized program. So let's actually answer the question instead of dodging it with "well it depends."

Let's be specific about who this is actually for. This isn't for the person trying to optimize their program down to the perfect single lift. It's for the person who's got 15 minutes between meetings, or is squeezing something in before the kids wake up, or genuinely cannot commit to a full session most days of the week. If that's you, the question isn't "what's the best exercise," it's "what's the one exercise that gives me the most for the least amount of time I actually have." That's a completely different question, and it has a real answer.

If I had to pick exactly one exercise, for almost everyone in that situation, it's the split squat.

Why not the deadlift, or the squat, or literally anything else?

Those are all great, don't get me wrong. But here's the thing that makes the split squat different: it's the only one on that list that actually looks like your life.

You don't walk around on two feet planted shoulder-width apart, bracing for a max effort lift. You walk. You climb stairs. You run. You lunge to grab something off the floor. Almost everything you do outside the gym happens with one foot doing more work than the other, one leg out in front, weight shifting, your hip and knee figuring out how to control that load in real time. The split squat trains exactly that pattern, loaded, repeatedly, safely.

A back squat is a fantastic exercise. It's also nothing like walking, running, or climbing stairs. The split squat is.

What it actually builds, all at once

This is the real case for picking one exercise over another when time is the constraint. You need something that's doing multiple jobs simultaneously, not just hammering one quality in isolation.

• Single-leg strength. You're loading one leg at a time, which is a much more honest test of strength than a bilateral lift where your stronger side can quietly bail out your weaker one.

• Hip and pelvic stability. Staying balanced and controlled in a split stance forces your hip stabilizers to actually do their job, the same muscles responsible for keeping your knee from caving in when you run or cut.

• Real range of motion. Your front leg gets real hip and knee flexion, your back leg gets real hip extension. You're covering ground most people never touch in a standard squat.

• Balance and coordination. You can't zone out during a split squat. Staying upright and controlled is part of the exercise, not a side effect of it.

That's strength, stability, mobility, and coordination, from one movement. Nothing else on the list does that much work per rep.

How to actually do it

Stagger your stance, one foot forward, one foot back, far enough apart that your front shin stays roughly vertical as you lower down. Drop straight down until your back knee gets close to the ground, then drive back up through your front heel. Keep your torso upright and your hips level the whole way, no leaning forward to cheat the range of motion.

Start bodyweight if you need to. Once that feels controlled, add dumbbells or a kettlebell. And if balance is the limiting factor before strength is, elevate your back foot on a bench and turn it into a rear-foot-elevated split squat, same pattern, more range, more demand.

If you've got 15 minutes and one exercise, a barbell setup is working against you. Loading and unloading a bar, adjusting a rack, getting positioned under it, that's time you don't have, spent on logistics instead of actual training. A pair of dumbbells or a kettlebell sitting by the door means you can be moving within 10 seconds of deciding to train.

There's also a real training benefit here, not just a convenience one. Dumbbells in each hand or a single weight held goblet-style force each side of your body to stabilize independently. It can also help train your grip and upper body in a meaningful way at the same time! For someone getting the most out of one exercise, free weights aren't the compromise. They're a valid tool.

Strength or conditioning? With one exercise and limited time, you don't have to choose.

This is the other question people get stuck on, and the answer is that the split squat can be either, depending entirely on how you load it and how you rest.

• Training for strength means fewer reps, more weight, more rest. Think 4 to 6 reps per side, resting close to a minute or more between sets, pushing weight that genuinely challenges you by the last couple reps.

• Training for conditioning means the opposite: lighter weight, higher reps, minimal rest. Think 12 to 15 reps per side, barely resting before switching legs or starting the next set, letting your heart rate climb and stay there.

Same exercise, same 15 minutes, completely different stimulus, just by changing the load and the rest period. If you're truly only getting one session in, alternating which version you do, strength-focused one day, conditioning-focused the next, is a perfectly reasonable way to make sure neither quality gets neglected. You don't need two different exercises to train two different qualities. You need one exercise and the willingness to change how you're doing it.

The takeaway

If you're only going to do one exercise, do the one that actually resembles how your body moves through the rest of your life. That's the split squat, not because it's trendy, but because it's genuinely doing the most work per rep of anything you could pick. This isn't the ideal long-term plan, and it's not meant to replace a real program once you actually have time for one. It's what you do on the days when one exercise is all you've got, so that "no time" doesn't mean "no progress."

Only got a few minutes to train today? That's still enough.