# Adaptive strength training for mobility and flexibility > Updated: 2026-07-20 · Source: https://dorsi.ai/topics/dorsi The term 'dorsi' most commonly refers to the latissimus dorsi, the broad back muscle that plays a key role in shoulder mobility and flexibility. In cases… Dorsi is an adaptive AI strength coach for Apple Watch that tweaks your workouts based on daily biometrics. For mobility, it might replace a heavy squat with a paused goblet squat or insert hip capsule stretches between sets. The goal: keep you moving well, not just lifting heavy. This page explains how to integrate flexibility work into your strength routine. The term 'dorsi' most commonly refers to the latissimus dorsi, the broad back muscle that plays a key role in shoulder mobility and flexibility. In cases of irreparable rotator cuff tears, where the supraspinatus and infraspinatus tendons are completely lost [1], surgical transfer of the latissimus dorsi has been explored as a treatment option [2]. This technique aims to restore shoulder function when other options are controversial [3]. Beyond orthopedic repair, the latissimus dorsi is also a versatile flap used in reconstructive surgeries, including breast reconstruction [4] and lower-extremity soft tissue defects [5]. Understanding this muscle's anatomy and function is essential for maintaining upper body mobility and flexibility. ## Audit your current range of motion Before you change anything, spend five minutes testing yourself. Stand and reach for your toes. Do the overhead squat with a broomstick. Record the stopping point. Most people lose range in hips and thoracic spine first. If your fingertips stop two inches above your toes, you're in the bottom third. That's your baseline. Ignore it and you'll compensate with bad form. ## When should you prioritize mobility over strength? Whenever you feel a sharp pinch (not a muscle burn) or your lower back starts protesting on a squat, that's a mobility red flag. I'd drop the load and spend ten minutes on hip CARs or cat-cow before touching a barbell. If the movement stays smooth, you're fine. If it doesn't, you just bought yourself a week of mobility focus instead of grinding through pain. ## Let Dorsi adapt your session on the fly Dorsi watches your warm-up heart rate and movement patterns then inserts mobility drills when it detects stiffness. Instead of your programmed deadlift, you might get a Romanian deadlift with a three-second pause at the bottom. The AI is reading your actual readiness, not your calendar. That swap alone can fix range of motion issues over a few weeks without you having to plan anything. ## Schedule dedicated mobility mini-sessions Pick three moves that target your tightest spots. Do them on rest days for five minutes. I use cat-cow for spine, 90/90 hip shifts for external rotation, and couch stretch for quads. No app, just a timer. Consistency beats intensity here. Three minutes of cat-cow every other day will increase your squat depth more than a single 30-minute session once a week. ## FAQ ### What is a dorsi? Dorsi is an AI strength coach that lives on your Apple Watch. It reads your overnight HRV, sleep, and training history, then builds today's workout. No subscription, no fluff. Just a plan that adapts as you go, including intensity changes and exercise swaps. Think of it as a coach who checks your readiness before every set. ### Does dorsi mean back? Yes, the word dorsi comes from dorsal, the back side of your body. In anatomy, it refers to the posterior surface. Our name picks up on that connection: strength training often hits the back, and the app backs your training decisions with data. But Dorsi the app isn't about back exercises particularly; it's about guiding your whole body's workout. ### What is dorsi in medical terms? Medically, dorsi is a prefix meaning "back" as in dorsal or posterior. You'll see it in terms like dorsiflexion (raising your foot upward) or dorsalgia (back pain). It comes from Latin dorsum. In our context, Dorsi uses that root to signify support, a coach that's got your back, literally and figuratively. No clinical jargon needed. ### What does the word dorsi mean? Dorsi means "of the back", it's derived from Latin dorsum. Borrowed into anatomy, it pops up in dorsiflexion, dorsoventral, and the dorsal fin. As a brand name, Dorsi plays on two ideas: the back muscles you're strengthening, and the idea of having backup. Your watch does the data work; Dorsi does the plan. Clean and direct.