

Happy Thursday, Zapien.
Sports Medicine And Longevity: The Metrics That Actually Matter — Three numbers that predict longevity and injury risk better than anything your wearable tracks. The most at-risk group might surprise you.
Pro Longevity Dashboard — Track 90+ blood markers, benchmark your fitness, and skip 250 hours of research.
Community highlights: Where to source testosterone for women in Europe, the diet protocol that ended a four-year fertility struggle, and a community poll on what healthy aging actually looks like.
Dr. Frederik Dierick — The MD building longevity medicine into hospitality and tech. His personal protocol is leaner than you'd expect.
Forever,
Karol, Martin, Simon & Andy
Presented by
Community Discussion
Sports Medicine and Longevity: The Metrics That Actually Matter

This week's piece comes from a medical doctor working at the intersection of longevity medicine, technology, and hospitality, who argues that the metrics most consumer wearables track miss the ones that actually predict lifespan and injury risk.
There is a category of risk that quietly kills more people each year than overweight or high cholesterol, and the public health response to it does not match the body count.
The most surprising finding is who in the wellness-conscious crowd is most exposed to a hidden hormonal deficit.
Inside the article: the strength ratio almost no one trains for, the daily energy threshold most lean active adults breach without realising, the early sign of overtraining a wearable cannot detect, and the one weekly addition to any workout that prevents the most common knee and hamstring injuries.
Short Hack Long Life
The Once-A-Week Nordic Hamstring Curl
Hamstring strains are the most common (and most stubborn) injuries in recreational training, and most of them trace back to the imbalance Dr. Dierick describes in the article: a hamstring producing nowhere near sixty-five percent of the force its quadriceps does. The Nordic hamstring exercise loads the muscle eccentrically, lengthening it under tension, which is precisely the moment most strains occur. A landmark Danish soccer trial found that adding the Nordic curl to regular training reduced new hamstring injuries by around sixty percent and recurrent injuries by roughly eighty-five percent.
The fix: A 2017 meta-analysis pooling more than 8,000 athletes confirmed an average fifty-one percent reduction in hamstring injury rates when prevention programmes included the Nordic curl. Even a single weekly set produces measurable eccentric strength gains in untrained adults. Low volume, high return.
The Protocol:
🕐 When: Once a week, at the end of an existing workout. Pick the same day every week so it never becomes a decision. Friday post-session is the easiest anchor for most people.
🎯 Specificity: One set of 5 to 8 reps. Kneel on a soft surface with your ankles secured (a partner pinning your heels, a barbell on the floor, or a sturdy bench). Keep hips fully extended in line with your torso, then lower yourself forward as slowly as possible, controlling the descent with hamstring effort alone. Catch yourself with your hands when control runs out, then push back to the start position. The goal is the slow eccentric, not a clean concentric.
🚫 Friction removal: No equipment? Tuck your ankles under a heavy couch. If a full controlled descent is too hard at first, lower partway and assist back up with your hands; the safe range will extend over a few weeks. If you miss a session, just resume the next week. There is no need to "make up" volume.
📊 Tracking: Aim for a slower controlled descent each month rather than more reps. Most untrained adults can extend their drop time noticeably within four weeks. Soreness for one to two days after the first session is expected and decreases sharply by the fourth week.
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WhatsApp Group Summary
Testosterone Therapy For Women In Europe
Discussion: A member asked where to source injectable testosterone appropriately dosed for women in the EU, given that no licensed European product exists at female-appropriate doses (only AndroFeme cream in Australia/UK).
The verdict: The community pointed to NP Labs in Athens, Greece as a compounding source. A few practical caveats came up. Injectable testosterone is typically suspended in castor or grape seed oil rather than supplied as sterile powder, which makes DIY dilution from peptide form unsafe. Getting a prescription for compounding is straightforward; the safer path is working with a clinic experienced in female-appropriate dosing.
Consider this: Women's hormone health is one of the most underserved corners of longevity medicine in Europe. In the US, virtual telehealth visits and compounding pharmacies have made physiological-dose testosterone widely accessible to women. In the EU, the same therapy still requires individual workarounds. If you're navigating perimenopause, low libido, or post-hysterectomy fatigue, our Perimenopause Longevity Guide covers the markers and protocols worth understanding first.
Healthy Aging Poll On LinkedIn
Discussion: A community member is running a poll on what healthy aging actually looks like in practice, and is asking Zapiens to weigh in.
The verdict: Spend 30 seconds voting on the LinkedIn poll. The aggregated answers will be useful raw material for anyone trying to define their own benchmark.
Consider this: Definitions of healthy aging tend to drift toward whatever metric is easiest to measure: VO2 max, biological age, grip strength. The richer question is which trade-offs compound over decades. Our Slow Aging Guide covers the decisions that matter most.
Fertility Struggles And The Egg Quality Diet
Discussion: A community member shared their experience after years of failed IVF and IUI cycles, persistent "you're just too old" diagnoses, and a turning point that came from outside conventional reproductive medicine.
The verdict: What moved the needle was the Egg Quality Diet by Aimee Raupp, a functional-medicine protocol designed to reduce systemic inflammation, with results typically visible after about three months. Their wife became pregnant after 2.5 months on the protocol. Practical advice from the thread: vet your OBGYN carefully (they consulted four before finding the right fit), prioritise comprehensive testing, accept that there is no one-size-fits-all path, and protect your mental state through the process.
Consider this: Egg quality is a longevity question as much as a fertility one. Mitochondrial function, oxidative stress, and chronic inflammation drive both aging and reproductive outcomes, which is why nutrition, sleep, and stress management can shift markers that hormone protocols cannot. Our Pregnancy & Longevity Guide covers the levers worth pulling 6 to 12 months before conception.
Community Health Stack

Dr. Dierick Frederik
A medical doctor and entrepreneur working at the intersection of longevity medicine, technology, and hospitality. He builds his clinical practice around the metrics that actually predict a long, capable life, which are rarely the ones surfaced by standard checkups or consumer wearables.
Frederik’s Health Routine
Morning: Wake up at 6.45 am. Brush teeth. Floss. Do some squats jumps to wake up.
Read at least 10 pages in a non-fiction book. Practice new language (currently Spanish) for 20-30min.
Make a high protein and high fiber breakfast (Greek yogurt + kefir with raspberries, blueberries, home made high protein chia pudding, almonds etc..). Take creatine (9gram), vit D (3000 IU), and omega 3 forte (800mg EPA, 400 mg DHA).
Morning walk. Get some sun in my face, connect with my fiancee and go over the planning of the day.
Deepwork with coffee until lunch time.
Lunch time, again high protein, high fiber lunch. Only whole foods.
Deepwork again. Last coffee around +-2.30pm. Fruits when needed. Do some jumping squats in between sessions.
Diner, whole foods again. Veggies + meat/fish.
Strength training (currently training for maximal strength. High weight, low reps, low repetitions. Max 30min sessions to prevent neuromuscular fatigue.)
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Health Disclaimer
New Zapiens’ products and services are not intended to substitute for professional medical guidance. Our content and media offerings do not aim to diagnose, cure, or address any medical issues.



