You know you should lift. You are vaguely doing some squats with light dumbbells and a few lunges. And nothing much is changing. The problem is almost always the same: not heavy enough.
Once women are convinced that strength training is worth doing, the next question is the one nobody answers clearly: how heavy, how many reps, which exercises, and how do I progress? So let me answer it properly, in plain numbers, for a female runner or triathlete who wants strength that actually carries over to her sport.
If you are still not sure strength is worth your time, start with my piece on why endurance women should lift. If you are sold and just want to know what to do, this is for you.
The strength and bone benefits that make you a better, more durable athlete come from lifting genuinely heavy. Endless reps with a light weight build very little, which is why so many women lift for months and see nothing change.
Heavy, for a given exercise, means a weight you could only lift for a handful of reps with good technique before your form would break. That is the stimulus that tells your muscles, tendons and bones to get stronger. Light and easy does not send that message.
How Heavy, How Many Reps
You do not need to max out or train like a powerlifter. But you do need to work in a range that builds real strength.
- For your main lifts, work in roughly the 4 to 8 rep range, with a weight that makes the last rep or two genuinely hard while your form stays good.
- Do a few sets of each main lift, for example 3 to 4 working sets, with proper rest between them.
- Rest properly between sets, two to three minutes on the heavy lifts. Strength adaptation needs recovery within the session. This is not a sweaty circuit.
- Leave a rep or two in reserve on most sets. You should not be grinding to total failure every set, especially as an endurance athlete also running and riding.
If you can comfortably do 15 reps, the weight is too light to build much strength. Go heavier and drop the reps. That single shift is what makes the difference for most women.
Which Exercises Actually Matter
You do not need a complicated programme or every machine in the gym. A handful of big, compound movements covers almost everything a runner or triathlete needs.
- A squat pattern: back squat, goblet squat or split squat. Builds the big leg muscles that drive you.
- A hinge pattern: deadlift, Romanian deadlift or hip thrust. Builds your glutes and hamstrings, the engine of running.
- Single-leg work: lunges, step-ups, single-leg deadlifts. Running is single-leg, so train it single-leg. This is where a lot of injury-proofing lives.
- A push and a pull: press and row, for a balanced strong body, useful posture and, for triathletes, the swim and bike.
- Calf work: heavy calf raises. Your calves take huge load in running and are often neglected.
Two sessions a week, each built around a squat, a hinge, some single-leg work and a bit of upper body, covers it. You do not need more than that alongside your endurance training.
Four tests at home, then a twenty minute routine built around whichever one you fail.
Progressive Overload: The Secret Nobody Mentions
Here is the thing that actually drives results, and the thing most women skip. To keep getting stronger, you have to keep gradually asking for more. This is called progressive overload.
- When a weight starts to feel manageable for all your sets, add a little load next time. A small jump is plenty.
- Or add a rep or a set before you add weight. Both count as progression.
- Keep a simple log of what you lifted. You cannot progress what you do not track.
- Progress slowly and let your technique lead. Strength is a long game, and good form always comes first.
Lifting the same weight for the same reps forever is the gym equivalent of running the same easy pace and expecting to get faster. Your body adapts to what you ask of it, then stops. Keep nudging the bar up, sensibly, and you keep getting stronger.
But Won't I Get Bulky or Tired for Running?
No on both counts. Female physiology plus all your endurance training makes big muscle gains very unlikely. What you get is stronger, more powerful and more durable, not bigger. I cover the bulky myth fully in my lifting guide.
On fatigue, the key is placement. Do your heavy lifting on or near your harder training days, or with enough gap before a key session, so your legs are fresh when it matters. Keep strength away from the day before your big run or ride. Done sensibly, lifting makes your running feel better, not worse, because you are stronger and more resilient under the same load.
Starting From Scratch
If you are new to lifting, do not jump straight to heavy. Spend the first few weeks learning the movements with lighter weights, grooving good technique, before you add real load. Getting coached through the basics early, even a handful of sessions, saves you months of guessing and protects you from doing the big lifts badly. Once the pattern is solid, start adding weight. Everyone starts somewhere, and the woman deadlifting confidently in the gym was a beginner wobbling through goblet squats not long ago.
Lifting Through Perimenopause
One more thing worth flagging. As oestrogen declines through perimenopause and menopause, heavy lifting becomes even more important, because it is one of the strongest signals you have to hold onto muscle and bone. If anything, this is the time to make sure you are lifting properly heavy, not backing off. I go into the whole picture in my perimenopause training guide.
A Sample Two-Session Week
To make it concrete, here is how two strength sessions might look alongside your running. Nothing fancy, and it is the shape I use with a lot of my athletes.
- A squat variation, 3 to 4 sets of 5 to 8.
- A single-leg exercise like a split squat or step-up, 3 sets each side.
- A calf raise, heavy, 3 sets.
- A short core finisher.
- A hinge like a Romanian deadlift or hip thrust, 3 to 4 sets of 5 to 8.
- A single-leg deadlift or lunge variation, 3 sets each side.
- A press and a row, 3 sets each.
- A short core or glute finisher.
Each session takes around 40 to 45 minutes including warm-up. Two of these a week, kept consistent, is more than enough to make you a stronger, more durable runner.
Fitting It Around Your Running
The most common worry is that lifting will leave your legs trashed for running. It comes down to placement. A few simple rules keep both happy.
Put your heavy lifting on or near your harder running days, so your easy days stay genuinely easy and recovery-focused.
Leave a gap before a key run or race. Avoid heavy legs work the day before your long run or a big session.
If you must choose on a busy week, a shorter, heavier session beats a long drawn-out one. Quality over time in the gym.
In a hard race build, keep two sessions where you can, even if you trim them. Dropping strength entirely when training peaks is exactly when your body needs the protection most.
Home or Gym?
A gym with barbells and proper weights makes heavy lifting and progression easiest, and if you can get to one, it is worth it. But you can build real strength at home too, with a set of adjustable dumbbells or kettlebells, resistance bands and a bit of creativity. The principle does not change: the load has to be challenging and you have to progress it over time. Bodyweight alone works at the very start and for single-leg control, but you will outgrow it quickly for the big muscles, because you cannot easily make a bodyweight squat heavy enough. If home is what fits your life, get some adjustable weights that go heavy enough to keep challenging you as you get stronger.
How Do I Know I'm Lifting Heavy Enough?
Since lifting too light is the number one problem, here is a simple gut-check. By the last rep of a working set, it should feel genuinely hard, like you had maybe one or two more reps in you and no more, while your technique still held. If you finished the set and could easily have done another five, it was too light. If your form fell apart halfway through, it was too heavy, so drop it a little. That window, hard but controlled, is where strength is built. Trust that feeling more than any number on the dumbbell, because what counts as heavy is personal and changes as you get stronger.
Recovery and Deloads in the Gym
Strength training follows the same logic as your running. You get stronger during recovery, not during the session itself, so you cannot lift heavy every day and expect progress. Two quality sessions a week, with rest around them, is plenty alongside endurance training. And just as your running needs lighter weeks, your lifting benefits from the occasional easier week too, especially if you are feeling run down. Every few weeks, or when life is heavy, drop the load or the sets for a week and let your body absorb the work. You will come back stronger. Pushing heavy every single week with no let-up is how niggles and burnout creep in. Strength is a long, patient game, and the women who stick with it for years are the ones who are stronger at 50 than they were at 35. That is the real prize here, bigger than any single race. The strength you build now is what keeps you running, lifting, chasing goals and staying independent for decades. Every properly heavy session is an investment in the woman you will be in twenty years, not just your next finish line. That is why I treat strength as non-negotiable for the women I coach. It makes you a better athlete now, and it protects the strong, capable, independent body you want to carry you through every decade ahead. So load the bar properly, progress it patiently, and lift like the long-term athlete you are becoming. Future you will be very glad you did.
The Short Version
Most women lift far too light. Heavy, for a given lift, means hard for a handful of reps with good form.
Work your main lifts in roughly the 4 to 8 rep range, a few sets each, with proper rest. If you can do 15, go heavier.
Build around compound movements: a squat, a hinge, single-leg work, a push and pull, and heavy calf raises.
Two focused sessions a week is plenty alongside endurance training.
Progress gradually: add load, reps or sets over time, and log it. Progressive overload is what drives results.
It will not make you bulky or wreck your running if you place it sensibly. It matters even more through perimenopause.
Lift like you mean it, progress it, and watch your running change. Strong over small, every time.
This article is general information, not individual coaching or medical advice. If you are new to lifting, have an injury, or any health condition, get qualified guidance before starting a heavy strength programme.
- You are doing "some strength" but nothing is changing
- You have no idea how heavy to go or how to progress
- You want strength that carries over to your running and racing
- You want a proper programme, not random gym circuits
If you ticked two or more, this is exactly what I build into my athletes' weeks.
Apply to work with me →If you want proper strength programming built into your endurance plan, that is what I do.
Female-specific endurance coaching with strength as standard, not an afterthought. Progressive, specific, built around your running and your life.
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