Your body has changed. Your training should too.

The strength training companion built for the body that changes after 45.

By signing up, you agree to receive PrimeSets communications. You can unsubscribe anytime.

You've paid a coach. You've quit.

  • 01

    Private coach at $1,500-$15,000/year, then drop-off after three months.

  • 02

    Generic apps designed for 25-year-old bodies.

  • 03

    YouTube programs that ignore your physiology and joints.

This time, your companion doesn't let go. PrimeSets evolves with every session based on your sleep, recovery, and executive schedule — no human to answer to.

Built for 45+ physiology — not adapted for it.

The science of 45+ resistance training

Not a hobby. A physiological protocol.

For 45+ professionals who manage their body like an asset. Three 45-minute sessions a week. Metrics, not instincts. The evidence: rebuilding muscle, metabolic health, and cognition past 45 requires resistance training — alongside aerobic work, not replacing it.

01 · The 45+ window

Three to eight percent.

−3 to −8%

Lean mass lost per decade · accelerating past 50

×2

Rate of decline roughly doubles past age 50

Skeletal muscle stays adaptable past 50, but anabolic resistance raises the stimulus threshold. Enter earlier, compound longer.

Breen & Phillips, Nutr Metab, 2011 · Mitchell et al., Front Physiol, 2012

Before May 18, 2026

Founding member — $59/month for life

$59/monthinstead of $85/month

Lock in your founder rate before launch. This price will not be offered after public release.

By signing up, you agree to receive PrimeSets communications. You can unsubscribe anytime.

  • No credit card required
  • No formal commitment
  • Unsubscribe anytime

Three ways to start.

Solo

$29/month

billed monthly

The essential app, without adaptive AI. Exercise library, base programs, load journal.

  • 45+ exercise library
  • Base programs
  • Workout journal
  • Load tracking
Recommended

Premium

$85/month

billed monthly

Founder: $59/month for life

The full companion. Adaptive programming, vision nutrition, recovery, travel mode.

  • Everything in Solo
  • Rules + AI adaptive programming
  • Conversational companion
  • Composite recovery score
  • Photo nutrition
  • Travel mode
  • Weekly check-ins

Duo 45+

$129/month

billed monthly

Founder: $99/month for life

Two Premium accounts for a 45+ couple. Shared progression, cross-partner accountability, synced travel mode.

  • Two independent Premium accounts
  • Shared couple dashboard (opt-in)
  • Cross-accountability: partner streaks and milestones
  • Synced travel mode for trips together
  • Savings vs two separate Premium subscriptions

Lucid, not aesthetic.

Portrait éditorial — approche scientifique
01

Proprietary Rules Engine

Every program validated in code. Capped intensity, joint protection, plateau detection before you feel it.

02

45 / 55 / 65 granularity

Your physiology is neither that of a thirty-something nor of a senior. Volume, intensity, and recovery tuned to your decade.

03

Transparent decisions

Every adaptation is explained. Why this load, why this deload, why this substitution — you see the reasoning, not just the prescription. Decision-makers don't accept black boxes.

Frequently asked questions

Before May 18, 2026

Take back control.

Join the 100 founders before May 18, 2026. $59/month locked for life, TestFlight beta access before the App Store release.

By signing up, you agree to receive PrimeSets communications. You can unsubscribe anytime.

  • No credit card required
  • No formal commitment
  • Unsubscribe anytime