Fitness journeys
Fitness journeys compared
Six ways to build a strong body, compared side by side with a source on every claim.
The six routes
- BodybuildingMuscle size is the product: volume, a measured surplus, then a slow deficit.0.25-0.5% of bodyweight gained per week, the novice and intermediate target in the off-season
- Combat sportsSkill, repeated hard bouts and weight-class management.3,427 N average straight-punch force of seven Olympic boxers, mostly set by effective mass (2005 study)
- Extreme disciplineRule-bound progressions that end at a hard gate: a selection course, a skill or a meet.29% vs 42% fitness-related dropout with individual advice against the historical average (n=137)
- Harsh environmentsLarge energy deficits, overuse injuries and high attrition.36% dropout in a 690 km Arctic ultramarathon (8 of 22)
- Social trendsShort-form trends spread fast and teach little.297 TikTok workout videos analysed; mostly time-lapse with little instruction
- CalisthenicsBodyweight training set against weights, using short trials and injury surveys.59% of 181 Dutch calisthenics athletes reported an injury in 12 months (survey share, not a rate)
Tools and explainers
Ratings and most stage lengths are our own reading, labelled editorial. Injury figures in different units are never compared.
Not medical advice. Published research, summarised for general information. Speak to a doctor or qualified coach before changing training, food or weight.
Keep exploring
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