Alexander Hernandez - Trainer

Higher coffee intake may support healthy aging by preserving muscle strength, reducing weight loss, and lowering the risk of frailty in older adults.

A 2025 study in European Journal of Nutrition (PMID: 40274674) looked at the relationship between habitual and midlife coffee consumption and the risk of (pre-)frailty in 1,161 community-dwelling adults aged 55 and older.

Participants grouped by average daily coffee intake:

- 0 cups/day
- 0–2 cups/day (reference group)
- 2–4 cups/day
- 4–6 cups/day
- 6 cups/day

Findings:

- 2–4 cups/day: not significant
- 4–6 cups/day: odds ratio: 0.36 - significant
- 6 cups/day: odds ratio 0.37 - significant

🔹 7-Year Frailty Incidence
- 2–4 cups/day: hazard ratio: 0.41

🔹 Individual Frailty Components:
- Lower odds of weight loss and weak grip strength in higher coffee intake groups.

🔹 Coffee Type:
- Decaffeinated coffee (>2–4 cups/day) showed strongest reduction in frailty/pre-frailty risk over 3 years.

Limitations:

- Observational design (no causal inference)
- Coffee consumption was self-reported
- Differences in coffee type/preparation not controlled
- Confounding from unmeasured lifestyle factors possible

Does carbohydrate timing after exercise matter?

A recent study (PMID: 39263899) looked at how delaying carbohydrate intake post-exercise affects next-day performance in trained male athletes. Participants completed eight intervals at 85% peak power output, followed by a 30-minute time trial.

The athletes were divided into two groups:
1️⃣ Immediate carbohydrate Intake: Consumed 1.2 g/kg body weight of carbohydrates immediately post-exercise.
2️⃣ Delayed carbohydrate Intake: Consumed the same 1.2 g/kg body weight of carbohydrates, but three hours later.

Findings:
-The delayed carbohydrate group experienced a 30% reduction in next-day high-intensity interval performance.
-Despite similar muscle glycogen levels, they completed five fewer intervals and reported higher perceived exertion, indicating impaired recovery.

Nutrient timing may be important for endurance athletes or athletes engaged in high-intensity activities. Immediate post-exercise carbohydrate replenishment optimizes recovery and helps sustain peak performance in consecutive training sessions (at least in this case).

I post about creatine-related research once weekly. The reason is obvious in that I am an advocate of raising awareness for increasing intake and/or its use as a supplement for a large percentage of people who visit my page.

Currently, legislative efforts are underway to restrict the sale of creatine to minors, despite over 680 peer-reviewed studies confirming its safety, necessity, and benefits across all age groups. Creatine is a critical component of cellular energy metabolism, supporting muscle function, brain health, and overall physiological performance—and restricting access could have negative consequences on health and development. Yesterday, the issued a press release outlining the following:
✔️ The body requires 2-4g of creatine per day, sourced from endogenous synthesis and dietary intake (primarily from meat and fish).
✔️ Growth & Development: Higher creatine intake (>1.5g/day) is associated with greater height, lean mass, and improved bone density, particularly in children and adolescents.
✔️ Cognitive & Mental Health: Low creatine intake (

A randomized controlled trial (DO-HEALTH - PMID: 39900648) published this month in Nature Aging looked at the effects of omega-3 fatty acids (1 g/day), vitamin D (2,000 IU/day), and structured exercise on biological aging (using DNA methylation clocks - see limitations below) in 777 older adults (average age: 70 years) across five European countries over three years.

Findings:
✅ Omega-3 supplementation alone slowed biological aging, as assessed by DNA methylation clocks.
✅ Combining omega-3, vitamin D, and exercise led to greater reductions, with the strongest effect observed in the PhenoAge aging clock.
✅ The combined intervention reduced biological age by up to 3.8 months over three years, demonstrating a synergistic effect.

Exercise in the trial was defined as: participants followed a structured home-based program designed to improve strength, balance, and flexibility—an accessible and sustainable regimen for older adults.

Limitations:

- The participants were already relatively healthy, active, and well-nourished older adults, limiting the magnitude of observed improvements.
- While DNA methylation clocks provide epigenetic estimates of aging, they primarily reflect systemic aging rates rather than immediate physiological function.
- Other studies measuring functional aging (e.g., VO₂ max, muscle strength, telomere length) often report larger reductions in biological age, as exercise directly impacts cardiovascular and metabolic function.
- The study assessed short-term aging trajectories.
- Findings may not generalize to younger populations or individuals with pre-existing metabolic conditions (where the magnitude of finding may have been larger).

Microplastics in the brain and bloodstream have become a growing neurovascular concern

A new study (PMID: 39901044) published in Nature Medicine has confirmed that microplastics and nanoplastics can enter the human brain and bloodstream, raising significant concerns about their potential neurotoxic and vascular effects.

Findings:

- 50% increase in brain microplastic accumulation over the past 8 years
- Individuals with dementia had the highest concentrations of microplastics in brain tissue
- Microplastic levels in the brain were 7–30 times higher than in the liver or kidneys
- Polyethylene, a polymer commonly found in plastic packaging, was the most abundant plastic detected in the brain
- Microplastics accumulate in blood vessels and immune cells (read below to see why relevant)

A rodent study (PMID: 39841831) published January in Science Advances showed that microplastics can enter the bloodstream, where they are take up by immune cells, leading to cerebral thrombosis and reduced blood flow in the brain (possibly the same mechanism through which potential harm is caused in humans). Mice exposed to microplastics exhibited neurobehavioral impairments, including reduced movement, cognitive decline, and signs of anxiety.

As plastic pollution increases, so does the potential for long-term damage to the brain and cardiovascular system.

Creatine Supplementation: Dosing Strategies

Research supports two effective approaches for creatine supplementation:

1️⃣ Loading Phase for Rapid Saturation of Creatine Stores (optional but not necessary) - Most useful when looking to maximize benefits of creatine as quickly as possible (i.e.

A recent study (PMID: 39012673) looked at the long-term effects of six months of HIIT on hippocampal-dependent learning in adults aged 65-85, with results persisting for up to five years.

Findings:

- HIIT preserved hippocampal volume, reducing age-related brain atrophy.
- Participants showed enhanced brain connectivity, improving memory retention and cognitive function.
- Increased BDNF (Brain-Derived Neurotrophic Factor) and cortisol levels correlated with improved learning ability.
- Low- and moderate-intensity exercise did not produce the same cognitive benefits, highlighting HIIT’s unique neuroprotective effects.

Note: While aerobic and resistance training have documented cognitive benefits, this study suggests that high-intensity exercise specifically supports hippocampal function and may slow brain aging.

A newly published systematic review and meta-analysis (doi:10.1136/bjsports-2024-108748) in the _British Journal of Sports Medicine_ demonstrates that individuals classified as fit (defined as cardiorespiratory fitness and measured using Vo2 Max) - even when overweight or obese - showed no significant increase in cardiovascular disease or all-cause mortality.

Findings:

- Fit individuals across all BMI categories exhibited no significant difference in mortality risk compared to normal weight-fit individuals.
- On the other hand, unfit individuals, regardless of BMI, showed a 2-3-fold increase in mortality risk.
- Obese-fit individuals were found to have a lower risk of mortality than normal weight-unfit individuals, highlighting the protective effects of cardiorespiratory independent of adiposity.

This review analyzed data from 20 studies comprising 398,716 participants globally. It called for a shift in focus from weight-loss-centered (note “centered” as a key term - not ignoring weight and adiposity altogether) approaches to fitness-based interventions for improving health outcomes, particularly given the challenges and risks associated with weight loss (including use of weight loss drugs) and weight cycling.

Current evidence suggests that even modest increases in physical activity among sedentary individuals [like brisk walking for 30 minutes per day] can lead to substantial reductions in mortality risk.

A study published last month (PMID: 39324186) in Circulation reveals that both weekend warrior (concentrated exercise in 1–2 days) and regular exercise patterns (evenly distributed activity throughout the week) are equally effective in reducing disease risk across 16 major disease categories.

Findings:

- Lower Risk Across 200+ Diseases: Both patterns significantly decrease the likelihood of developing conditions, including cardiovascular, digestive, mental health, and neurological illnesses.
- Cardiometabolic Benefits:
- Hypertension: 23% lower risk (weekend warrior) vs. 28% (regular exercisers).
- Diabetes: 43% lower risk (weekend warrior) vs. 46% (regular exercisers).

This research suggests that total weekly physical activity volume (≥150 minutes of moderate-to-vigorous exercise) is more critical than how it's distributed.

The average American is prescribed 14.98 medications per year.

Physical activity is the most effective intervention available for promoting brain health and longevity. Recent research demonstrates that regular exercise, even in modest amounts, is effective for enhancing brain volume, improving memory, and reducing the risk of neurodegenerative diseases. Beyond its cognitive benefits, moderate physical activity also contributes to extended lifespan and better overall health outcomes.

Even regular walking has shown to have powerful impacts on brain structure and function:

*️⃣Activity levels equivalent to 4,000 steps per day have been linked to measurable increases in gray matter and white matter volumes (PMID: 38073389)

*️⃣A 2011 study showed that 40 minutes of walking, three times per week lead to a 2% increase in hippocampal volume over one year, effectively reversing 1–2 years of age-related atrophy and enhancing spatial memory performance (PMID: 21282661).

*️⃣A more recent study suggests that activity levels equivalent to walking just under 3 hours daily for the least active populations could extend lifespan by 11 years on average (doi: 10.1136/bjsports-2024-108125).

Even walking is an accessible, non-pharmacological intervention for promoting brain health, reducing disease risk, and enhancing longevity.