New research reveals why lowering the weight — not just lifting it — may be the most valuable, most overlooked element of resistance training.
A new systematic review and meta-analysis published in Sports examines the comparative benefits of eccentric versus concentric training across healthy adults, older adults and clinical populations. For operators, the findings challenge a widespread blind spot in how strength training is coached and programmed on the gym floor.
What This Episode Covers:
Hosts Luke Carlson and Rachel Chonko break down a meta-analysis comparing eccentric (muscle-lengthening) and concentric (muscle-shortening) training across diverse populations, unpacking why the lowering phase of a lift may carry more physiological value than the lifting phase itself.
Key discussion points include:
- The physiological distinction between eccentric and concentric muscle actions, and why eccentric work carries a lower metabolic and cardiovascular cost.
- Eccentric trainings outsized effects on maximal strength, power, rate of force development and hypertrophy.
- The connection between power, rate of force development and all-cause mortality risk.
- Why explosive strength and maximal voluntary contradiction showed the largest benefits in the review.
- How these findings apply specifically to aging and clinical populations.
Why This Matters for Operators:
The research suggests that most strength training happening in health clubs today is missing its most valuable component — with direct implications from programming, coaching standards and member outcomes across every age demographic.
Key implications include:
- Personal trainers and coaches should prioritize controlled, slower eccentric loading rather than allowing members to drop or rush the lowering phase of a lift.
- Power and rate of force development decline faster than strength with age, making eccentric-focused programming a high-value tool for longevity-minded members.
- Eccentric modalities offer a lower-cardiovascular-strain option for clinical and de-conditioned populations, expanding safe programming options for higher-risk members.
- This paper provides a research-backed talking point trainers can use to reinforce coaching credibility with clients.
- Facilities serving active-aging or clinical populations should consider auditing current programming to ensure eccentric loading is being coached deliberately, not left to chance.
Listen or Watch:
Audio: Available on SoundCloud, Apple Podcasts and Spotify.
Video: Watch the full episode on YouTube.
Research Referenced in This Episode:
