5 Reasons why you should never skip leg day!
Written by Martin Ebner
Updated Sept 2026
Leg day has become an internet joke, but I’ve never needed persuading. I’m a leg-day man, without apology. I love the effort, the simplicity and the feeling of walking out knowing I’ve trained half my body properly. There’s a satisfaction in making your legs stronger that’s difficult to explain until you’ve experienced it.
Your lower body contains some of the biggest muscles you’ve got, and they’re responsible for most of the things that move you through the world, standing up, walking, climbing stairs, running and lifting something off the floor. Training them doesn’t need to mean destroying yourself under a barbell, but it should ask something of you. It means choosing exercises that suit you, performing them well and giving them enough time to progress.
1. YOUR LEGS DO A LOT OF THE WORK
Your glutes, quadriceps and hamstrings make up a substantial share of your total muscle, with your calves helping to move and steady you every time your feet meet the ground. Training them gives you more force for lifting, running, jumping and carrying, but the reason isn’t a magical effect that only happens on leg day.
The old fitness-industry explanation was that heavy squats and deadlifts produced such a big rise in testosterone and growth hormone that training legs helped every other muscle grow. Those hormones can rise briefly after training, but the evidence doesn’t show that the rise drives extra muscle growth. Train your legs because strong legs are worth having and because leaving half your body out of a strength program makes no sense, that’s enough.
2. THE STRENGTH LEAVES THE GYM WITH YOU
Most people don’t need to know the name of every muscle in the thigh. They care that stairs feel easier, getting up from the floor isn’t an event, and carrying a suitcase through an airport doesn’t turn into a full-body negotiation. That’s what real-world lower-body strength looks like, and it’s one of the things I value most about training legs.
It matters more as the years pass. Research in older adults shows that lower-body resistance training can improve strength and everyday physical function, even without enormous amounts of weekly work. I’d rather build that reserve before you need it than wait until ordinary movements have started becoming harder.
3. MOST SPORTS BEGIN AT THE GROUND
Running, cycling, jumping, changing direction and hitting or throwing something all begin with force travelling through your legs. Stronger legs won’t automatically make you skilful, quick or well conditioned, but they give you more force to work with and make it easier to tolerate the demands of the activity you enjoy.
I’m all for training hard, but timing matters. A brutal leg session the day before your longest run or hardest match isn’t clever programming, it’s just bad timing. If sport is the main event, place the harder lower-body work where it won’t compromise your recovery, then adjust the volume when your sport becomes more demanding.
4. A BALANCED PHYSIQUE INCLUDES YOUR LOWER BODY
Let’s not pretend appearance doesn’t matter. Plenty of people lift because they want to look better, and there’s nothing wrong with that. Strong legs look fantastic, and if physique is part of your goal, ignoring half of it is an odd way to go about things.
Quads, hamstrings, glutes and calves all change how a physique looks, but you don’t need a separate exercise for every line in an anatomy book. A knee-dominant movement, a hip hinge and some single-leg work will cover most of the job, then calves can get their own attention if they matter to you. The exercise names are less important than whether you can perform them well and make progress.
5. THERE’S NO COMPULSORY LEG EXERCISE
Some people avoid training legs because they think leg day means back squats, heavy deadlifts and two days of walking like they’ve forgotten how knees work. It doesn’t. A back squat is one option, not an entrance exam.
I love a hard leg session, but I’ve got no interest in difficulty for its own sake. If an exercise suits you, use it. If it doesn’t, a leg press, hack squat, split squat, step-up or another variation may fit far better. Research suggests muscle can be built across a wide range of loads when the work is sufficiently challenging, although heavier training still has an advantage when maximal strength is the goal.
I’m not emotionally attached to any particular lift, and you shouldn’t keep one simply because the internet decided it was essential. The best exercise is the one that trains what you want it to train, feels right in your body and gives you somewhere to progress.
WHAT A GOOD LEG SESSION LOOKS LIKE
You don’t necessarily need a separate leg day. Full-body and split programs can build similar strength and muscle when the total weekly work is comparable, so use the structure that fits your week. The important bit is that your legs appear in the plan regularly, rather than being postponed whenever time gets tight.
A good leg session can be beautifully uncomplicated. A leg press, Romanian deadlift, split squat and calf raise will cover plenty of ground. Two or three challenging sets of each is enough to begin, with a repetition range that lets you keep control and feel the intended muscles doing the work. The final repetitions should demand your attention without your technique falling apart.
Record what you do, then add a repetition or slightly more weight when you’ve earned it, which is the same principle I explain in my progressive-overload guide. Leg day should feel demanding, but it shouldn’t be a weekly punishment. You want to train hard enough for the session to matter, recover properly, then come back and build on it.
If you’re training to add size, the work also needs enough food, protein and recovery behind it. My clean-bulking guide covers the food side, while the hardgainer workout and diet guide puts the whole process together. You’ll also find more on recovering between workouts if your legs are still objecting when the next session comes around.
I love leg day because it’s honest. You put the work in, keep track of it and, over time, your legs become stronger and more capable. You don’t need to enjoy it quite as much as I do, but give it a proper place in your program and you may understand why I keep banging on about it.
If you’d like more of the thinking behind how I train, eat and coach, subscribe to Check It Oot. I send it once or twice a month, with useful advice, honest opinions and the occasional detour into whatever’s caught my attention.
