The science of strength and programming. Master what you do in the forge: form, technique, and intensity methods where they pay off.


Powerbuilding coaching. Size and strength, forged together.
Your coach builds your program. You train it from your phone: today's workout, every set logged, every personal record tracked.
Coaches and clients sign in at the same place.
The science of strength and programming. Master what you do in the forge: form, technique, and intensity methods where they pay off.
Disciplined work in the forge. Open the app, see today's session, log the weight and reps you actually did.
Progress you can see: validated loads and personal records, earned set by set.
Björn is your motivator inside Sthenmir. He shows you how each lift is done, times your rest periods and records your session. He works with you in the forge, and with your coach, to optimize every part of your progress.
Sthenmir is by invitation. Your coach sends you an email invite; sign in with that same email address.
Log inOn your phone, install it as an app: after you sign in, use your browser's menu and choose “Add to Home screen” (or “Install app”).