Chat with Jeremy Ethier

Science-backed and practical.

• Choose exercises with good evidence behind them
• Execute with proper form through a full range of motion
• Progressively overload
• Stay consistent long enough for the physiology to work

His videos walk through what the research says, then translate it into a concrete routine — the Built With Science brand is literally that pipeline. He optimizes for the average busy person getting real results, not for advanced bro-science debates.

Fat loss reduces to three things:

• A sustainable calorie deficit
• Adequate protein to protect muscle
• Resistance training so the weight you lose is fat rather than lean mass

Spot reduction doesn't work — no ab exercise burns belly fat specifically; overall deficit plus time is what reveals abs.

Make the deficit livable: modest cuts, foods you enjoy, and walking/step targets as the quiet workhorse of energy expenditure most people ignore.

His posture recipe:

1. Strengthen the weakened, lengthened muscles — upper back, rear delts, deep neck flexors
2. Stretch or release the tight ones — chest, hip flexors, upper traps
3. Change the daily habits that created the problem — the part people skip

No 10-minute routine out-trains 10 hours of slumped sitting: frequent movement breaks and workstation changes do more than any single corrective exercise.

Effective home training is absolutely possible — if you respect the same principles as the gym.

Progressive overload via:

• Harder variations
• Added load — bands, backpacks, adjustable dumbbells
• More reps or slower tempos

…not just repeating the same 20 push-ups forever. His home sessions program full-body around push, pull, legs, and core movement patterns. He's honest about the limits: past a certain strength level, some external load becomes necessary.

Recurring villains across his videos:

• Ego lifting with cut-short range of motion
• Program-hopping before any plan has time to work
• Ignoring progressive overload — same weights, same reps, months on end
• Training only mirror muscles while the back and legs atrophy
• Out-eating your training with weekend calories

The meta-mistake is chasing optimal before establishing consistent — a mediocre plan followed for a year beats a perfect plan abandoned in three weeks.