Sperm motility is the percentage of sperm moving forward in a semen sample. When that number is low, the diagnosis is asthenozoospermia, and it is one of the more responsive fertility parameters to changes in daily habits. Sperm production runs on a cycle of roughly three months, so changes you make now will not show up in a repeat analysis until about 70 to 90 days later. That timeline matters because most men with poor sperm motility can work through a list of concrete, evidence-informed adjustments to increase conception chances before considering assisted reproduction.
Reduce scrotal heat first
The testicles sit outside the body because sperm production needs a temperature a few degrees below core body temperature. Heat disrupts that process at the cellular level. Sauna-level heat temporarily lowers sperm count and can worsen morphology, and the effect reverses once the heat exposure stops (Garolla et al., Human Reproduction, 2013). In one study, men who stopped regular wet heat exposure had semen parameters recover (Shefi et al., Fertility and Sterility, 2007). Motility is part of that same temperature-sensitive system.
If you use a sauna or hot tub more than once a week and your motility is low, the first question is whether to pause those sessions for one full sperm cycle. Ask your doctor what makes sense for your situation. You do not need to avoid heat forever, but when conception is the immediate goal, reducing heat is one of the most direct changes you can make.
Everyday heat matters too. Tighter underwear and prolonged sitting raise scrotal temperature compared to looser underwear and movement (Jung et al., 2005 and Mieusset et al., 2007). A laptop directly on the lap measurably raises scrotal temperature (Sheynkin et al., 2005). In a fertility-center cohort, men who reported wearing looser, boxer-style underwear had higher sperm concentration and total count than men wearing tighter styles (Minguez-Alarcon et al., 2018). Motility was not the primary outcome in that cohort, but the same thermal environment affects all developing sperm.
Here are the concrete moves that reduce heat exposure:
- Pause sauna or hot tub use for one full sperm cycle if your motility is low.
- Choose underwear that does not pull the testicles tight against the body. A relaxed fit with room for airflow keeps the area closer to the temperature it prefers.
- Stand up every 30 to 45 minutes if you sit for long stretches.
- Keep the laptop on a desk, not on your lap.
Reduce plastics and endocrine disruptors where you can
Microplastics have now been detected in human testicular tissue and semen (Hu et al., 2024, Zhao et al., 2023, and Li et al., 2024). One multi-site study in China found microplastics in every semen and urine sample tested and linked mixed exposure to poorer sperm parameters in regression models (Zhang et al., 2024, eBioMedicine). That is an association, not proof that plastics caused the low motility. You do not need proof of cause to reduce obvious exposure.
BPA, a chemical used in some plastics and can linings, has been associated with lower sperm quality in a meta-analysis (Lu et al., 2024, Toxics). Phthalates, used in fragrances and soft plastics, have been studied for effects on male reproductive health (Rodprasert et al., 2021, Frontiers in Endocrinology).
Start with hot food and drink. Heat accelerates chemical migration into food, so avoid microwaving in plastic and do not put hot food into plastic containers. A few practical swaps:
- Use glass or stainless steel for leftovers and meal prep.
- Reduce canned food when a fresh or frozen alternative exists.
- Choose unscented personal care products when you can.
- Decline paper receipts or wash your hands after handling them. Thermal paper is a source of BPA.
Fix nutrition deficits before chasing supplements
Low motility is not a single-nutrient problem. The evidence for antioxidant supplements is mixed. Some trials show improvements in motility, others show no difference. Before you buy a stack of pills, get blood work. Ask your doctor to check vitamin D, zinc, folate, and thyroid function. A deficiency is worth correcting. A megadose without a deficiency has less support.
Most of the nutrients that appear in sperm quality research come from ordinary food. Here is where to get them:
- Zinc: oysters, beef, pumpkin seeds
- Selenium: Brazil nuts, fish
- Folate: leafy greens, beans, lentils
- Coenzyme Q10: organ meats, beef, fatty fish (food amounts are small compared with trial doses)
- Vitamin C: citrus, bell peppers, kiwi
- Omega-3 fats: salmon, sardines, walnuts
If your diet is low in these foods, adding them is a reasonable step. If you already eat a varied diet, a supplement may add little. Alcohol and tobacco affect the same system through separate pathways. Heavy alcohol use and smoking are consistently linked to poorer semen parameters. Reducing both during a three-month conception window is a low-cost change with no downside.
Move more, sit less, sleep consistently
Regular moderate exercise supports the metabolic and hormonal conditions that sperm production depends on. The evidence for exercise as a direct motility booster is mixed, but sedentary time raises scrotal temperature. A 30-minute daily walk shifts body composition, insulin sensitivity, and stress hormones in a direction that helps, though it does not act as a direct motility booster.
Sleep is where testosterone production peaks. Observational studies have linked chronic short sleep with lower testosterone. Aim for 7 to 9 hours on most nights. If you work night shifts, discuss with your doctor, because circadian disruption can affect reproductive hormones.
Stress management works through the hypothalamic-pituitary-gonadal axis, the signaling system that drives sperm production. Chronic stress hormones can suppress that signal. One bad week will not ruin your motility. Months of poor sleep and high stress can stack. Practical tools are consistent sleep timing, regular meals, and movement. If anxiety or depression is in the picture, treat that with a professional.
Time intercourse with the fertile window
Motility matters most at the moment sperm meet cervical mucus. You cannot change motility overnight, but you can improve the odds by timing. Sperm survive in the female reproductive tract for up to five days, so intercourse every 1 to 2 days during the fertile window is a common clinical recommendation. This avoids long abstinence, which can reduce motility in some men, and keeps a fresh population of sperm available when ovulation occurs.
At-home ovulation predictor kits help, but do not turn sex into a scheduled medical event. The goal is consistent intercourse across the fertile window, not a single perfectly timed encounter.
Get a proper medical workup
Poor motility rarely exists in isolation. A reproductive urologist can evaluate for a varicocele, which is a dilated vein in the scrotum. Other causes include infection, hormonal imbalances, medication effects, and obstruction. A physical exam, hormone panel, and sometimes a scrotal ultrasound are standard first steps.
If a reversible cause is found, treatment may improve motility. If no cause is found, the strategies above become more important. Assisted reproduction, including intrauterine insemination or IVF with intracytoplasmic sperm injection, is a conversation for your fertility specialist, not something to delay if other measures have failed.
Motility is a number that can move. The sperm you produce today started maturing about 70 days ago. Changes you make now show up in a repeat analysis three months from now. The sequence is straightforward: reduce heat, fix the obvious lifestyle factors, test for deficiencies, and get a proper workup. That is not a guarantee of conception, but it is a plan built on the mechanisms that drive sperm development.
This content is for educational purposes only and is not medical advice. Oakman products are designed for physical comfort and cooling; they make no claims about fertility, sperm quality, or hormone levels. Consult a healthcare professional for personalized advice.