Body Composition & Fitness
Train to a number, not a mirror.
InBody analysis, metabolic rate testing, and personalized nutrition plans — guided by a clinician and an advanced functional nutritionist who knows what it takes to actually change a body.
What it is
The scale is the least useful number in body composition. Muscle mass, fat distribution, segmental lean mass, visceral fat, and metabolic rate are where actual progress lives — and those are what we measure.
Why TWW
Most 'body comp' in the region is either a gym handing you a body-fat estimate, or a med-spa selling a machine. At TWW, the scan is the beginning of a clinical conversation — interpreted against your hormone panel, nutrition, training, and recovery. Numbers with context, from a clinician who treats patients.
What's covered
Included protocols & diagnostics
- InBody 570 multi-frequency bioelectrical impedance scan
- Segmental lean and fat mass distribution
- Visceral fat area + trending
- Resting metabolic rate estimation
- Nutrition strategy consultation (macros, timing, supplementation)
- Training-side coordination with AMT and external coaches
How it works
Your path from first visit to ongoing care
Baseline scan
InBody scan in under 60 seconds — no prep beyond hydration and consistent timing.
Consult
45-minute review of your scan against your goals and current program.
Plan
Nutrition and training guidance — built around your schedule and what you'll actually do.
Track
Monthly or quarterly rescans to confirm you're changing what you intended to change.
What you'll see
A sample InBody report — and what the numbers mean.
The InBody 570 prints a dense single-page summary. Here's a representative result and how a clinician reads it.
InBody 570 · Body Composition Analysis
Sample · 38yo · 5'10"For illustration only. Real reports include segmental analysis (arms, trunk, legs), ECW/ICW balance, body water history, and trending over prior scans.
Reading the chart
This sample shows a moderately muscular adult with a body-fat percentage in the athletic range — but a visceral fat area that is borderline elevated. Without context, the bathroom scale would say everything is fine. The InBody catches what the scale misses.
The three numbers worth understanding deeply are visceral fat, skeletal muscle mass, and phase angle. Each tells a different story about how your body is composed and how well your cells are functioning.
Visceral fat (VFA)
Visceral fat is the metabolically active fat that wraps around your liver, pancreas, and intestines. Unlike subcutaneous fat (the fat you can pinch), visceral fat releases inflammatory cytokines and free fatty acids that drive insulin resistance, cardiovascular disease, and most age-related metabolic decline. You can be lean on the outside and high on visceral fat — sometimes called "thin on the outside, fat on the inside."
SMM (skeletal muscle mass)
SMM is the mass of the muscle attached to your skeleton — the muscle you can train, that burns glucose, that stabilizes joints, and that keeps you independent in your 70s and 80s. Higher SMM correlates with better insulin sensitivity, better recovery from illness or surgery, lower fall risk, and lower all-cause mortality. SMM peaks in your 30s and declines roughly 3–8% per decade after 30 unless you actively defend it through resistance training and adequate protein.
Phase angle
Phase angle is the unsung metric most people miss. It's calculated from how your body's cells respond to a small electrical current — specifically, the angle between the cell-membrane resistance and the cellular reactance. In plain terms, it reflects how intact and well-hydrated your cell membranes are. It's a marker of cellular health, mitochondrial integrity, and recovery capacity. Lower phase angles are associated with malnutrition, chronic inflammation, illness, and frailty; higher phase angles correlate with athletic performance and longevity.
Common questions
InBody FAQ
How accurate is the InBody compared to a DEXA scan?
For tracking change in the same person over time, the InBody 570 is highly reliable — typically within 1–2% of DEXA when test conditions are consistent (hydration, time of day, fasted vs. fed). DEXA is still the gold standard for absolute bone density and very precise regional fat distribution, but the InBody wins on speed, no radiation, and the ability to scan frequently to actually see your trend.
How do I prep for a scan?
Best practice: hydrate normally the day before, scan in the morning, fasted or 3+ hours after eating, after using the bathroom, and before training. Avoid lotion on hands and feet. Most importantly — be consistent. A scan at 7 AM fasted compared to a scan at 4 PM after lunch is comparing apples to oranges.
Who shouldn't use the InBody?
Anyone with an implanted electrical device — pacemaker, defibrillator, or certain neurostimulators — should not use bioelectrical impedance. Pregnancy is also a relative contraindication. Tell us if either applies and we'll plan accordingly.
How often should I rescan?
For most adults: every 4–8 weeks while actively changing body composition, then quarterly to maintain. Scanning more often than that adds noise without adding signal. Members of every TWW tier get a quarterly scan included.
What if my visceral fat is high but I look lean?
This pattern is actually common — and exactly why we scan. The interventions are the same family (resistance training, protein, sleep, sometimes targeted peptide therapy like Tesamorelin), but the urgency is higher because high visceral fat in an otherwise lean person is often paired with insulin resistance and elevated ApoB. We'd typically pair the InBody with a metabolic panel to confirm and direct the protocol.