Hip thrusts turn on your butt and hamstrings more than squats, but both exercises work your front thigh muscles just as hard.
Scientific Claim
The barbell hip thrust and back squat elicit different patterns of muscle activation in trained women, with hip thrusts preferentially activating the gluteus maximus and biceps femoris while producing similar vastus lateralis activation.
Original Statement
“The barbell hip thrust elicited significantly greater mean (69.5% vs 29.4%) and peak (172% vs 84.9%) upper gluteus maximus, mean (86.8% vs 45.4%) and peak (216% vs 130%) lower gluteus maximus, and mean (40.8% vs 14.9%) and peak (86.9% vs 37.5%) biceps femoris EMG activity than the back squat. There were no significant differences in mean (99.5% vs 110%) or peak (216% vs 244%) vastus lateralis EMG activity.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design cannot support claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The claim uses 'differ' and 'preferentially activating' to describe observed EMG patterns without implying causation. Language is consistent with the observational, descriptive nature of the study.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.
Systematic Review & Meta-AnalysisLevel 1aWhether the differential activation pattern between hip thrusts and squats is reproducible across populations and protocols, and whether it predicts differential training outcomes.
Whether the differential activation pattern between hip thrusts and squats is reproducible across populations and protocols, and whether it predicts differential training outcomes.
What This Would Prove
Whether the differential activation pattern between hip thrusts and squats is reproducible across populations and protocols, and whether it predicts differential training outcomes.
Ideal Study Design
A meta-analysis of 20+ EMG studies comparing hip thrusts and squats across trained populations, analyzing gluteus maximus, biceps femoris, and vastus lateralis activation ratios under standardized 8–12RM conditions.
Limitation: Cannot determine if activation differences lead to functional or structural adaptations.
Randomized Controlled TrialLevel 1bWhether training with hip thrusts vs. squats leads to differential hypertrophy of glutes and hamstrings while maintaining similar quadriceps growth.
Whether training with hip thrusts vs. squats leads to differential hypertrophy of glutes and hamstrings while maintaining similar quadriceps growth.
What This Would Prove
Whether training with hip thrusts vs. squats leads to differential hypertrophy of glutes and hamstrings while maintaining similar quadriceps growth.
Ideal Study Design
A 16-week RCT of 100 trained women randomized to either hip thrust-dominant or squat-dominant training (3x/week, 10RM), with primary outcomes of gluteus maximus and biceps femoris muscle thickness via ultrasound and vastus lateralis thickness, controlling for total volume.
Limitation: Does not isolate EMG as the mechanism for differential adaptation.
Prospective Cohort StudyLevel 2bWhether individuals who favor hip thrusts over squats develop more gluteal and hamstring mass over time without compromising quadriceps development.
Whether individuals who favor hip thrusts over squats develop more gluteal and hamstring mass over time without compromising quadriceps development.
What This Would Prove
Whether individuals who favor hip thrusts over squats develop more gluteal and hamstring mass over time without compromising quadriceps development.
Ideal Study Design
A 3-year prospective cohort of 300 resistance-trained women tracking primary lower-body exercise preference, with annual DEXA scans of gluteal, hamstring, and quadriceps muscle mass, controlling for training volume, diet, and experience.
Limitation: Cannot control for unmeasured confounders such as recovery, sleep, or genetic predisposition.
Evidence from Studies
Supporting (1)
The study found that hip thrusts work your butt and hamstrings harder than squats, but both exercises work your thighs equally — which is exactly what the claim says.