Sodium restriction is one of the most consistent BP levers in non-drug trials. The DASH-Sodium trial showed that reducing sodium from ~3,500 mg to 1,500 mg/day lowered systolic by about 7 mmHg and diastolic by about 3 mmHg, independent of the DASH diet effect.

Realistic starting point: < 2,300 mg/day if 1,500 feels extreme. Practical tracking: use Cronometer for one week to see where the sodium actually lives in your diet.

Practical swaps:

• Restaurant and fast food are the biggest sources. Cooking at home is the lever.
• Canned beans (400-600 mg/can) → no-salt-added or rinsed versions (saves ~300 mg/meal)
• Soy sauce (900 mg/tbsp) → coconut aminos (270 mg/tbsp)
• Deli meats → fresh cooked protein
• Salted nuts → unsalted
• Regular broth → low-sodium or homemade
• Watch labels on: bread, cottage cheese, Greek yogurt, sauces, soups. Sneaky sources.

BP effect: reduces systolic by 5-8 mmHg, diastolic by 3-5 mmHg (meta-analysis evidence). The BP effect appears within 4-6 weeks of consistent aerobic exercise.

Moderate intensity means you could hold a conversation but wouldn't want to sing. Brisk walking, hiking, cycling, rowing, and swimming all qualify. Your air bike HIIT work counts and is especially effective, but the 5-day target is about consistent aerobic volume.

Pairing with your existing training: Your HIIT air bike sessions already hit this intensity. On non-HIIT days, a 30-minute brisk walk covers the aerobic dose and supports recovery.

DASH was specifically designed and tested for BP lowering. It reduces systolic by 8-11 mmHg and diastolic by 3-5 mmHg in hypertensive people. It also aligns well with your ApoB and soluble fiber work.

Foods to add or increase:

• Fruits and vegetables (8-10 servings/day): Bananas, sweet potatoes, spinach, avocado, oranges, tomatoes, berries, beets (also have independent BP-lowering effect via nitrates)
• Whole grains (6-8 servings/day): Oats (double benefit for ApoB), brown rice, quinoa, farro
• Low-fat dairy (2-3 servings/day): Greek yogurt, low-fat cottage cheese (watch sodium), skim or 1% milk
• Lean protein: Fatty fish (omega-3s also help BP), chicken, legumes

Limit: Saturated fat (already working on this for ApoB), sodium (see above), red meat to < 2 servings/week.

Magnesium deficiency is extremely common in the US diet and contributes to elevated vascular resistance. Supplementation lowers systolic by about 2-3 mmHg and diastolic by about 1-2 mmHg on average, with larger effects in people who are deficient.

It also supports deep sleep and glymphatic clearance, making this a two-for-one for your brain health goals. Start at 200 mg/night for the first week to check GI tolerance, then increase to 300-400 mg. Why glycinate: best absorbed, gentlest on the GI tract.

Poor sleep raises cortisol, activates the sympathetic nervous system, and drives up BP. Even one night of inadequate sleep measurably elevates daytime BP. This is especially important given the glymphatic clearance connection.

• Consistent wake time matters more than consistent bedtime (anchor on wake time first)
• Screen brightness down 2 hours before bed, or blue-light glasses
• No alcohol within 3-4 hours of sleep (even one drink fragments sleep architecture)
• Room temperature 65-68°F is the research sweet spot for deep sleep

Chronic stress keeps cortisol elevated, which chronically elevates BP. This isn't about eliminating stress; it's about regular parasympathetic activation to counterbalance it.

• Diaphragmatic breathing: Box breathing (4 counts in, 4 hold, 4 out, 4 hold), or slow breathing at 6 breaths/minute for 10-15 minutes/day. Lowers systolic by 3-4 mmHg with consistent practice.
• Mindfulness meditation: Even 10-15 minutes/day, 3-5 days/week. Effect size is small (1-2 mmHg) but it compounds with other interventions.
• Nature time: Even short outdoor walks lower cortisol and resting BP. Connects with your hiking interest.

One of the best-evidenced non-pharmaceutical BP interventions. Meta-analysis of RCTs: reduces systolic by 6-7 mmHg and diastolic by 2-3 mmHg. The mechanism appears to be ACE inhibition (similar to a class of BP medications, just at a much smaller scale) plus antioxidant effects.

How to brew: 1-2 tablespoons of dried hibiscus flowers in 8-10 oz hot water, steep 10-15 minutes, strain. Add a little honey or fresh citrus if needed. Can be brewed in a big batch and refrigerated for the week.

Note: Don't combine with prescribed ACE inhibitors without telling your doctor, since the mechanism overlaps.