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ForumsExercise & Body CompositionReturn to running after weight loss — my results so far Page 5

Return to running after weight loss — my results so far

Dr.GastroMayo Thu, Feb 19, 2026 at 3:53 AM 28 replies 1,092 viewsPage 5 of 6
pam_stl
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Oct 2024
St. Louis, MO
Mar 5, 2026 at 9:26 PM#21

Following on from roxy_nash — and this may be the naive question:

How long did you give it before you decided it was working?

Last edited: Mar 6, 2026 at 2:26 AM
26 24Dr.ObesityMed, HealthEcon_DC, PedsEndoPhilly and 23 others
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DanielChem_CHI
Senior Member
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Mar 2024
Chicago, IL
Mar 10, 2026 at 8:17 AM#22
NicoleRaleigh said:
lean mass + resistance training is the combo.

Muscle fiber type changes during GLP-1-mediated weight loss, relevant to lean mass: preliminary biopsy data suggests that weight loss shifts the skeletal muscle fiber type distribution:

  • Decreased Type IIx (glycolytic, fast-twitch) fibers
  • Increased Type I (oxidative, slow-twitch) fibers
  • Improved mitochondrial density and function
  • Enhanced insulin-stimulated glucose uptake per fiber

This "metabolic remodeling" of muscle may contribute to improved insulin sensitivity independent of total lean mass changes. The muscle you keep becomes metabolically better, even if there's less of it[1].

References:
[1] Pirkmajer S, et al. Front Physiol. 2023;14:1123456.
Last edited: Mar 10, 2026 at 10:17 AM
27 0Dr.DermMIA, fiona_VT, denise_HTX and 24 others
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james_edin
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Sep 2024
Edinburgh, UK
Mar 14, 2026 at 7:06 PM#23
NicoleRaleigh said:
lean mass + resistance training is the combo.

DEXA scan update relevant to lean mass:

Scanned at months 0, 6, and 12. Here are the body comp numbers:

BaselineMonth 6Month 12
Total mass263 lbs223 lbs220 lbs
Fat mass123 lbs83 lbs55 lbs
Lean mass161 lbs154 lbs157 lbs
Body fat %40%34%24%

Lean mass preserved — actually GAINED 1-2 lbs thanks to progressive overload + 1.5g/kg protein. The lean mass discussion needs to include body comp data, not just scale weight.

28 1tane_welly, Dr.PathRoch, mona_PHX and 25 others
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GenomicsKate
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Cambridge, MA
Mar 19, 2026 at 5:52 AM#24
NicoleRaleigh said:
lean mass + resistance training is the combo.

This answered a question I did not know how to ask. I will report back once I have actually tried it.

Last edited: Mar 19, 2026 at 10:52 AM
29 2Dr.PeteFamMed, claudia_zurich, nancy_portland and 26 others
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Dr.BariatricHTX
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Feb 2024
Houston, TX
Mar 23, 2026 at 4:36 PM#25

Clinical perspective, offered as context rather than as advice.

Body composition tracking via bioimpedance on lean mass (InBody scan every 3 months):

MetricBaselineMonth 3Month 6Month 9
Skeletal Muscle (lbs)70706972
Body Fat (lbs)107826044
Body Fat %40%33%25%22%
Visceral Fat (cm²)1471228257

Note: skeletal muscle mass dipped initially then recovered with consistent resistance training + high protein. The visceral fat reduction is where the metabolic magic happens.

30 3maya_sedona, stefan_berlin, Dr.EM_Chicago and 27 others
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