Does strength training slow down endurance athletes?

No. This is a widespread myth without research support. A 2010 meta-analysis in the Scandinavian Journal of Medicine & Science in Sports reviewed 21 studies on concurrent training and found that adding strength training to an endurance program improved running economy by 4-8% and cycling economy by similar margins — without impairing aerobic capacity or VO2 max.

Won't I gain too much weight from lifting?

Not from the moderate volume appropriate for endurance athletes (2x/week). The research consistently shows that concurrent strength and endurance training programs do not produce significant body mass increases in trained endurance athletes. Muscle quality and neuromuscular efficiency improve; the scale moves minimally.

How should endurance athletes structure gym training?

Off-season: 3x/week progressive strength. Race build phase: 2x/week, maintain strength gains. Peak training weeks: 1x/week maintenance. Taper: skip or very light. The off-season is when strength is built; the race season is when it's expressed. This periodization model is used by elite endurance coaches worldwide.

Is Gate 14 the right gym for endurance athletes?

Yes. Gate 14's coached class format is particularly well-suited to endurance athletes because the programming is managed for them. They don't need to design a strength program on top of their running/cycling/swimming schedule. They show up 2x/week, do the coached work, and apply the results in their endurance training.

Endurance Athletes and Strength Training: Why the South Bay Running Community Lifts

The South Bay runs, rides, swims, and races more than almost any coastal community in the country. The beach culture, the running paths, the open water, the cycling routes to Malibu and the Palos Verdes Peninsula — these produce year-round endurance athletes who train seriously.

What the best endurance athletes in this community have figured out is that the gym is not the enemy of their running or cycling. It's the foundation that makes both possible for longer.

The research is settled

The question of whether strength training improves endurance performance was genuinely debated in sports science through the 1990s and early 2000s. It is no longer debated.

Key findings from the research base:

A 2010 meta-analysis in the Scandinavian Journal of Medicine & Science in Sports (Støren et al.): concurrent strength and endurance training improved running economy by 4-8% in trained runners.
A 2010 study in the European Journal of Applied Physiology: combined training improved cycling time-trial performance by 8.6% versus endurance training alone.
A 2016 systematic review in the Journal of Strength and Conditioning Research: strength training interventions reduced endurance sports injury rates by 30-50% across cycling, running, and triathlon populations.
A 2017 meta-analysis: strength training improved marathon performance and running economy in trained marathon runners.

The mechanism is neuromuscular efficiency — strength training makes each stride, pedal stroke, or pull more efficient by improving the rate of force development and muscle fiber recruitment patterns. You produce more output per unit of input.

The three benefits for South Bay endurance athletes

1. Economy improvement: Faster times at the same effort. This is the primary performance benefit. Stronger muscles use less oxygen per unit of power output — you run faster or ride harder at the same heart rate.

2. Injury prevention: The most common endurance sport injuries are overuse injuries from repetitive stress. Strength training builds the tissue resilience — tendon stiffness, bone density, muscle capacity — that absorbs repetitive loads without breakdown. Runners who lift get fewer stress fractures, IT band issues, and Achilles problems.

3. Late-race resilience: In any endurance event longer than 60 minutes, mechanical breakdown (form loss, compensations) is a primary limiter. Athletes with stronger supporting musculature maintain better mechanics deeper into fatigue. This is the difference between mile 20 of a marathon going well versus going badly.

The endurance athlete's program at Gate 14

The programming doesn't need to be complicated. The foundational movements that produce results for endurance athletes are the same five:

Movement	Exercise	Transfer
Hip hinge	Deadlift, Romanian deadlift	Running economy, sprint power, cycling watts
Single-leg	Bulgarian split squat, step-up	Asymmetry correction, hip stability
Squat	Goblet squat, back squat	Lower body power base
Core	Plank, dead bug, pallof press	Running and cycling posture under fatigue
Calf/ankle	Single-leg calf raise	Achilles capacity, running spring

Two sessions per week builds the foundation. The rest of your training time stays in your sport.

Gate 14 and the South Bay endurance community

El Segundo, Manhattan Beach, Hermosa Beach, and Redondo Beach produce serious runners, cyclists, and triathletes. The events calendar in the South Bay — Long Beach Marathon, Malibu Triathlon, Santa Monica Classic, Super Bowl 10K, Turkey Trots, ocean swims — means there is always something to train for.

Gate 14 is where those athletes add the strength component that makes everything else more effective.

See strength training for runners, cycling and strength training, and open water swimming for sport-specific frameworks. See Gate 14 membership options or gate14.net/contact.