Effects of 8-hour time restricted feeding

Unfortunately pretty slim results—pun not intended. I wonder if a year-long program would move any of the other indicators?
Body weight and energy intake decreased in the time restricted group (–2.6% ± 0.5; –341 ± 53 kcal/d) relative to controls over 12 weeks (P < 0.05). Systolic blood pressure decreased in the time restricted feeding group (–7 ± 2 mm Hg) versus controls (P < 0.05). Fat mass, lean mass, visceral fat mass, diastolic blood pressure, LDL cholesterol, HDL cholesterol, triglycerides, fasting glucose, fasting insulin, HOMA-IR, and homocysteine were not significantly different from controls after 12 weeks (no group × time interaction).
 
The body figures out a way to maintain homeostasis if calorie intake and activity are more or less the same. The bodyweight reduction appears to be a function of the caloric intake - if it helps people control their calories, that is a plus for many people.

My best success with IF comes with an increased protein intake relative to carbs; for me at least, my caloric intake will go down from just the higher protein intake and less carbs - meat is just more satiating. The IF contributes furtehr to that. I can continue building muscle as well with this protocol if I am careful no to overdo other activities. Nothing keto-like in terms of carb restriction, but the combo of intermittent fasting combined with increased protein intake (and fewer carbs), in my opinion would produce greater results.

I also like to do my intermittent fasting depending on activity level - if I am weight training and mountain biking in the same day, I'm just not going to do it; I'll be stressed out. For me it feels appropriate on days where I'm just weight training or I otherwise have low activity.
 

hCG Mixing Calculator

HCG Mixing Protocol Calculator

TRT Hormone Predictor Widget

TRT Hormone Predictor

Predict estradiol, DHT, and free testosterone levels based on total testosterone

⚠️ Medical Disclaimer

This tool provides predictions based on statistical models and should NOT replace professional medical advice. Always consult with your healthcare provider before making any changes to your TRT protocol.

ℹ️ Input Parameters

Normal range: 300-1000 ng/dL

Predicted Hormone Levels

Enter your total testosterone value to see predictions

Results will appear here after calculation

Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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