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Training tips, fitness insights, and strength building strategies to help you reach your goals.

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A dark chart plotting predicted lean-mass effect size against daily calorie deficit, falling from plus 0.16 at energy balance through zero at 500 calories a day to minus 0.15 at 1,000
Training

Can You Build Muscle in a Calorie Deficit? The 500-Calorie Limit

Can you build muscle in a calorie deficit? Across 59 studies, lean mass gains stopped once the deficit reached about...

Sep 16, 2026•11 min
A dark chart headed What stretching alone does, plotting pooled effect sizes of 0.21 and 0.45 for strength and 0.13 and 0.28 for muscle size, split by whether sessions ran under or over 15 minutes
Training

Does Stretching Build Muscle? What 42 Randomised Trials Found

Does stretching build muscle? Pooling 42 trials, static stretching moved size and strength a little, at a dose of 15...

Sep 15, 2026•10 min
A dark chart headed Muscle growth by rest between sets, showing pooled effect sizes of 0.47 for rest of 60 seconds or less, 0.65 for 61 to 119 seconds, 0.55 for 120 to 179 seconds and 0.50 for 180 seconds or more, with overlapping credible intervals
Training

How Long to Rest Between Sets for Muscle Growth

How long to rest between sets for muscle growth? Nine training studies, pooled: more than 60 seconds is worth it,...

Sep 14, 2026•12 min
A dark bar chart headed Same muscle growth, a third to a half the time, comparing minutes to finish an exercise: triceps pushdown at 2.4 minutes with drop sets against 5.3 with traditional sets, and dumbbell curl at 2.1 against 6.8
Training

Do Drop Sets Build Muscle? Same Growth, Less Gym Time

Do drop sets build muscle? Across five training studies they matched traditional sets for growth, in a third to a...

Sep 13, 2026•11 min
A dark chart comparing the classic training chart against pooled study estimates for reps to failure, showing 4 versus 4.9 reps at 90% of 1RM, 8 versus 9.8 at 80%, and 11 versus 14.8 at 70%
Training

How Many Reps at 80% of 1RM? The Chart Is Only an Average

How many reps at 80% of 1RM? Pooling 269 studies, the average was about 10 — and the spread between...

Sep 12, 2026•13 min
A dark chart headed How heavy should you lift to build muscle, with three muscle-growth rows of 0.12, 0.20 and minus 0.09 all crossing a dashed zero line, and three strength rows of 0.60, 0.34 and 0.26 sitting to the right of it
Training

How Heavy Should You Lift to Build Muscle? Load vs Strength

How heavy should you lift to build muscle? Pooling 28 studies, load barely moved muscle growth at all, and it...

Sep 11, 2026•12 min
A dark chart headed Does cardio kill gains, with three rows showing muscle fiber growth effects of minus 0.34 for type I fibers, minus 0.13 for type II fibers and minus 0.23 for both pooled, each range crossing or touching a dashed zero line
Training

Does Cardio Kill Gains? What Concurrent Training Does to Muscle

Does cardio kill gains? Pooling 15 training studies, adding cardio cost a little muscle fiber growth and nothing at all...

Sep 10, 2026•12 min
A dark chart headed Full range of motion vs partial reps, with a row each for strength, power, muscle size, sport tests and body fat, every dot sitting just to the right of a dashed no-difference line at values between 0.02 and 0.19
Training

Full Range of Motion vs Partial Reps: Does It Actually Matter?

Full range of motion vs partial reps: across 23 studies the gap is about 3%. Where in the range you...

Sep 09, 2026•13 min
A line chart titled Standardised Effect Size Estimate against Proximity-to-Failure, rising steeply from low velocity loss through the non-failure conditions, flattening across the moderate and high velocity loss conditions, and turning down at the momentary muscular failure point on the far right
Training

How Close to Failure Should You Train for Muscle Growth?

How close to failure should you train? A meta-analysis of 15 studies found that grinding out the last rep adds...

Sep 09, 2026•12 min
A chart of the pooled reduction in muscle soreness at 24, 48 and 72 hours after a hard bout, for people who did a light bout days earlier versus people who did not. The three values are 1.94, 2.52 and 2.70 standardised units, each with a confidence interval, all far past the 0.8 mark labelled as a large effect
Training

What Causes Delayed Onset Muscle Soreness: Novelty, Not Effort

What causes delayed onset muscle soreness is mostly novelty, not effort. A meta-analysis found one light bout days earlier removes...

Sep 08, 2026•12 min
A two-panel summary chart headed Supersets vs Traditional sets, with icons for muscle growth, maximum strength, reps and volume load on the similar side, and training efficiency, blood lactate, energy cost and perceived exertion on the greater-in-supersets side
Training

Do Supersets Build Muscle, or Just Save Time?

Do supersets build muscle? A meta-analysis of 19 studies found the same work done in about a third less time,...

Sep 08, 2026•11 min
A scatter plot of 220 study results with a fitted curve showing percent change in muscle size against weekly set volume per muscle group. The curve rises steeply from zero to about ten sets, then keeps climbing more gradually out to forty-five sets
Training

How Many Sets Per Week for Hypertrophy: Where Returns Diminish

How many sets per week for hypertrophy? A meta-analysis of 67 studies maps the dose-response curve, and shows where each...

Sep 07, 2026•12 min