Build muscle you can keep
Strength training helps protect muscle, joints, bone, and independence as you age.
Your adaptive training app
Train consistently, even when life gets messy
AgeShift is an adaptive training app for active adults. It builds a strength, cardio, and sport plan around your goals, equipment, injuries, and week, then adjusts each session when sleep, pain, stress, or schedule changes. Fuel, an optional AI calorie tracker, sits next to training.
Start your 21-day trial. No credit card required. Tell AgeShift how you train, what hurts, what equipment you have, and what your week looks like. It will build your first adaptive plan from there.
AgeShift at a glance
- What it is
- Adaptive training app for strength, cardio, and sport
- How it adapts
- Sleep, injuries, recovery, schedule, and training load
- Price
- 21-day trial, then from €60/year
Do WHATEVER.
One adaptive plan for every sport, goal, injury, and schedule.
Sports
- Rowing
- Triathlon
- Running
- Cycling
- Tennis
- Hiking
- Swimming
- Rock climbing
- Skiing
- Stand-up paddling
- Prehab
- Weightlifting
Tell us what you want to do. We help you along the way.
Not just another workout app
Most apps give you a plan and hope for the best. Age Shift App adapts to the day you're actually having.
- 01 Tell us how today actually feels — Energy, sleep, anything hurting, how much time you have.
- 02 We keep your bigger picture in mind — Your goals, your training load, and that race in 6 weeks. Today gets weighed against all of it.
- 03 Your session, built for you — Not for the version of you that had less than 8 hours of sleep and all-day meetings.
Connects to
AgeShift reads sleep, HRV, workouts, and recovery from the apps and devices you already use via intervals.icu.
- Garmin
- Polar
- WHOOP
- Oura
- Apple Health
- Google Fit
- COROS
- Rouvy
- Zwift
- Wahoo
The logic in action
Your inputs change every day. AgeShift maps them to session tweaks automatically—so you keep training without rebuilding the plan.
Live adaptations
Poor sleep → Lower intensity
Long ride planned → Reduce leg volume
Shoulder pain → Swap pressing
Travel week → Bodyweight plan
Tennis tonight → Protect calves
Stress at work → Shorter session
Race in 3 weeks → Start taper
Longevity, without the hype
The best longevity protocol is the one you can repeat.
Most longevity advice gets pulled toward supplements, tests, and optimization. But the biggest levers are still simple: sleep well, move often, build muscle, improve your cardiovascular fitness, and keep doing it for decades. AgeShift is built around that idea. It adapts your training around your real life so exercise becomes less fragile and more repeatable.
Train your engine
Cardio and VO2 max work support the capacity to do more, recover better, and stay active longer.
Stay consistent when life changes
Bad sleep, travel, pain, stress, and busy weeks should adjust the plan, not break it.
Start building your longevity habit
21-day free trial. No credit card required.
What clients say
AgeShift removes the last excuse not to train. Once I get to the gym, my personalized workout is ready - adjusted for my injuries, balanced for the day, and easy to change if I need variety.
I love how personal AgeShift feels. My workouts are built around my goals and constantly adapted by my trainer based on my progress, feedback, and how I'm feeling. Having my training, nutrition, and progress all in one place helps me see how everything connects and keeps me motivated.
I started using AgeShift because I wanted adaptability without overthinking every workout or giving up structure. The app gives me a clear plan, adapts around my health, past workouts, schedule and general feeling, and keeps me consistent when work gets busy. It feels great to work out in a way that adapts to real life in contrast to the fixed plans I've used before.
As someone who is active but also quite injury-prone, I really like that AgeShift makes it possible to keep pushing my limits without feeling like I'm constantly risking another injury. The plan adapts to the individual. If you tend to push yourself too hard, it helps keep you progressing in a more controlled way. And if you're already injured, it doesn't simply tell you to stop. It still finds safe ways to challenge you, so you can gradually get stronger, improve, and keep moving forward without making things worse.
Clinical Proof of Concept
I built this because the coaching apps I used trained as if I wasn't injured.
Started from a 300m run interval. Finished an Olympic distance triathlon in 2h 43min. Pain-free.
Returned to endurance training with bilateral Baker's cysts, neural heel tension, and proximal fibular irritation.
The system progressed when the body was ready and pulled back when symptoms increased.
Finished the race and ran off the bike pain-free.
Post-race symptoms stayed below the pre-race baseline.
AgeShift adjusted each session from daily feedback instead of forcing a fixed plan.
Progress comes from intelligent adaptation, not from forcing a rigid plan.
Old Way vs AgeShift
Old Way
- One goal at a time
- Static PDF plans
- Generic workout apps
- Smartwatch load tracking only
- All-or-nothing plans
- Pick-your-own libraries
AgeShift
- All goals. One system
- Adaptive programming
- Injury-aware adjustments
- Recovery-aware progression
- Schedule-aware training
- Sustainable capacity building
- Built-in coaching logic
Common questions
What is AgeShift?
AgeShift is an adaptive training app. It builds one plan for strength, cardio, and sport, then adjusts each session around sleep, injuries, recovery, and your actual week — not a static PDF.
What makes AgeShift different?
Most apps give you a fixed plan or a workout library. AgeShift tracks total load across lifting, endurance, sport, sleep, stress, and recovery, then changes today's session when life or your body changes.
What does AgeShift cost?
AgeShift starts with a 21-day trial of training and Fuel. Personal Training is €60/year (founding price for the first 5 members, billed annually). AgeShift Personal Training, which includes coaching, is €75/month. Cancel anytime.
What is Fuel?
Fuel is AgeShift’s AI calorie tracker. You point your camera at a meal to log calories and macros, reuse frequently eaten meals, and get a plan built around foods you like. It is included in the 21-day trial and in both paid plans.
Can I use AgeShift if I have multiple goals?
Yes. That is the point. You do not have to choose between building muscle, running, cycling, swimming, mobility, fat loss, or prehab. AgeShift balances multiple goals and adjusts around your total training load.
What if I already use Garmin, Strava, Whoop, or Oura?
Keep them. AgeShift is not a wearable replacement. It turns training, recovery, and life context into better session decisions — for example, whether those Garmin intervals still make sense after a hard lift and poor sleep.
Can I cancel anytime?
Yes. There are no long contracts. You can cancel anytime before your next billing cycle.
Is there human coaching included?
The yearly membership is app-based training and Fuel. AgeShift Personal Training adds human review, form checks, and access to Heinrich Tessendorf for people who want a coach looking over the plan.
Who is AgeShift for?
AgeShift is for people who want to train seriously without a rigid plan that ignores real life. It is especially useful if you are balancing strength, cardio, sport, mobility, injuries, work stress, and recovery at the same time.
Stop starting over
Your plan adjusts. Your progress compounds. Your excuses run out.
From the blog
Training smarter, not harder