The Most Effective Weight Training, Cardio & Nutrition for Women | Dr. Lauren Colenso-Semple

Human body temperature must increase by approximately 1 to 3 degrees Fahrenheit to wake up feeling energized.

"And in order to wake up feeling refreshed and energized, your body temperature actually has to increase by about 1 to 3°." (said at 0:09:00)

The claim accurately reflects the general physiological direction and approximate magnitude of the circadian core body temperature (CBT) rhythm, but oversimplifies the mechanism of waking alertness. Endogenous core body temperature reaches its minimum (nadir) in the second half of the biological night (typically 2–3 hours before habitual wake time) and rises by approximately 0.5 °C to 1.0 °C (~1 to 2 °F) heading into the morning and daytime peak. This temperature increase aligns with circadian alertness and metabolic activation. However, waking up feeling refreshed and energized is driven by an interaction of multiple factors (including dissipation of homeostatic sleep pressure, the cortisol awakening response, and sleep architecture), rather than solely a threshold rise of 1 to 3 degrees.

• context: Circadian Rhythm Sleep-Wake Disorders. (Continuum (Minneapolis, Minn.) 2017) · cited 79x in the literature

  "The endogenous circadian rhythms are one of the cardinal processes that control sleep. They are self-sustaining biological rhythms with a periodicity of approximately 24 hours that may be entrained by external zeitgebers (German for time givers), such as light, exercise, and meal times." (abstract, results, passage verified)

  pubmedfull study (doi)
• context: Higher central circadian temperature amplitude is associated with greater metabolite rhyth… (Scientific reports 2024) · cited 20x in the literature

  "Robust circadian rhythms are essential for optimal health. The central circadian clock controls temperature rhythms, which are known to organize the timing of peripheral circadian rhythms in rodents. In humans, however, it is unknown whether temperature rhythms relate to the organization of circadian rhythms throughout the body." (abstract, results, passage verified)

  pubmedfull study (doi)
• context: A novel method to separate circadian from non-circadian masking effects to enhance estimat… (Sleep medicine 2025) · cited 1x in the literature

  "One accepted method to track continuous daily changes in central circadian timing is to measure core body temperature (CBT), and establish daily, circadian-related CBT minimum time (Tmin)." (abstract, results, passage verified)

  pubmedfull study (doi)

Creatine monohydrate absorption and physiological efficacy are identical whether completely dissolved in liquid or ingested as dry powder with water.

"So even if you were to just dry scoop creatine and just chase it with water, the results are the same as if you blend it up until there's literally no bits left in the glass." (said at 1:44:40)

Pharmacokinetic data show that creatine ingested as a solid form or crystalline suspension in cold water is readily absorbed, but it is not pharmacokinetically identical to fully dissolved creatine in solution. In a randomized crossover study (PMID: 11811571), solid ingestion resulted in a 20% lower peak plasma concentration (Cmax) and a 30% to 35% lower area under the curve (AUC) over 6 hours compared to the same dose in fully dissolved solution, although it still elevated plasma creatine levels 5- to 6-fold.

• contradicts: Absorption of creatine supplied as a drink, in meat or in solid form. (Journal of sports sciences 2002) · cited 56x in the literature

  "Creatine ingested as a lozenge (crushed in the mouth and swallowed) or as a crystalline suspension in ice cold water resulted in a 20% lower peak concentration and 30-35% smaller area under the plasma creatine concentration curve than the same dose administered in solution." (abstract, results, passage verified)

  pubmedfull study (doi)