Body recomposition: lose fat, gain muscle

Recomposition: scale weight can hide what composition trends show

During recomposition, weight often stalls while fat mass and muscle mass trends change. Vita separates these curves into BIA estimates (not clinical accuracy).

Aria highlights the weeks when weight is flat but composition seems to improve: longitudinal tracking, sensitive to hydration, meals, exercise and time of day.

Useful metrics (confirmed list)

Priority metrics for recomposition: fat mass, muscle mass, lean mass, protein, calories, BMR / metabolic age, body water (noise), visceral fat (trend).

Full confirmed list: weight, BMI, fat mass, visceral fat, muscle mass, body water, bone mass, protein, metabolism/BMR, metabolic age, lean mass, calories.

Training, nutrition and recovery

Enough protein, progressive strength training and regular sleep. Elio estimates whether recovery is keeping up with the calorie surplus or deficit.

Related pages: /accompagnement/sport/, /journal/nutrition/, /vita/poids-seul-vs-composition/. PDF export before an appointment with a dietitian or coach.

Health information notice

Estimates ≠ diagnosis; ≠ DEXA. Variations with hydration, meals, exercise, time of day. Pacemaker contraindication. No promise of guaranteed recomposition.

Limits of bioimpedance to know about

BIA estimates composition using a weak electrical current. Hydration, meals, recent exercise and time of day change the values. Vita aims for standardized morning weigh-ins, barefoot on a hard floor.

Vita does not replace a DEXA scan, an MRI or a blood test. Trends over several weeks matter more than a single session. Pacemaker contraindication. Estimate ≠ diagnosis.

Confirmed metrics only: weight, BMI, fat mass, visceral fat, muscle mass, body water, bone mass, protein, metabolism/BMR, metabolic age, lean mass, calories. Hardware: 8 electrodes, ±0.05 kg (±0.11 lb), 8 profiles, $199 (local taxes and duties may apply on delivery; 12-month pack, one-time payment).

Cross-reference Vita with Elio (sleep, HRV), the nutrition journal and Sport support; export a PDF for your doctor if needed.

The Chutex ecosystem

Vita = composition at home. Elio = wrist signals. Aria links the two. Data hosted by Free Pro, a hosting provider with HDS (Health Data Host) certification. Chutex Care, the 4G connected telecare service, is available in France only, like medical teleconsultations; the involvement of a partner home-care organization depends on the area.

Useful related pages: /journal/nutrition/, /accompagnement/sport/, /programme-perte-de-poids/, /services-sante/, /vita/bio-impedance-limites/, /vita/poids-seul-vs-composition/.

Medical teleconsultations are currently available in France only.

What Vita does, and what it does not do

Vita does

• Estimates weight and body composition (fat mass, muscle, water, visceral fat) by bioimpedance.
• Automatically syncs weigh-ins over Wi-Fi to the Chutex app (up to 8 profiles).
• Manages weight goals, calories and macros with Aria AI, with reviews over 6 to 12 months and 24 months.
• Combines with the Elio band in the same app to cross-reference composition and wrist signals.
• With Elio and Vita correlated in the CHUTEX app: a noninvasive, indicative estimate of glycemic trends (not a glucose meter, not a blood measurement, not a diabetes diagnosis).
• With an eligible Chutex subscription (France only): access to health professionals, including teleconsultation included, by phone, in France only, with no guaranteed response time, depending on availability (prescription only if medically appropriate, no sick note or fitness certificate); other professionals depending on availability.
• Allows controlled sharing with a loved one, coach or professional (PDF export).
• Stores data in France with Free Pro, HDS certified, with CHUTEX as the data controller.

Vita does not

• Make a medical diagnosis (diabetes, osteoporosis, pathological obesity, etc.).
• Guarantee DEXA-type or hospital-exam clinical accuracy.
• Work as a glucose meter: Vita alone or Elio alone is not enough; an indicative estimate only when Elio and Vita are correlated in the CHUTEX app.
• Exist as a Vita Ring / connected ring: Vita is only a scale.
• Replace a dietitian, a doctor or medical advice.
• Work for people with a pacemaker or cardiac stimulator (BIA contraindication).
• Promise guaranteed weight loss.

Connected wellness device. Indicative bioimpedance estimates, sensitive to hydration, meals, recent exercise and time of weighing. See a health care professional if you have any symptoms.

How to get comparable measurements

• Weigh in the morning, fasted, after bathroom, dry feet.
• Same time daily when possible.
• Avoid immediately after exercise or a large meal.
• Flat, hard, stable surface.
• 12 measurement families, 50+ data points and trends per weigh-in.

Services by country

Vita services by market

The Vita bio-impedance scale is sold across Europe as a one-time purchase. Aria AI coach and the Chutex app are included. Chutex Care is available in France only; medical teleconsultation is currently available in France.

teleconsultation included, by phone, in France only, with no guaranteed response time and HDS hosting apply to eligible accounts in France only. Outside France, use local care pathways and emergency numbers (911 / 999 / 112). Vita is a wellness scale, not a medical diagnostic device.

The Vita scale is a connected wellness and body-composition tracking device. It is not a medical diagnostic device and does not replace professional medical advice. Bio-impedance measurements (fat mass, muscle, water, visceral fat - BMI, BMR, etc.) are indicative and intended for personal monitoring. Contraindicated for pacemaker wearers. See a doctor if you have symptoms or a medical condition.

FAQ