Beyond shoes, the gear that actually matters for runners falls into a few clear categories: GPS watches, headphones, hydration systems, clothing, and visibility. The Marathon Handbook gear library covers what works, what’s overpriced, and the small number of items that genuinely improve training quality. For shoes specifically, see the running shoes hub.
GPS Watches + Wearables
- Coros vs Garmin: Which Brand Wins for Runners
- Fitbit vs Garmin: Which Tracker Is Better for Running
- Apple Watch Ultra vs Series 8 for Runners
- Apple Watch Ultra 2 for Runners
- Apple Watch HRV: What Runners Need to Know
- How Accurate Is Garmin’s VO2 Max?
Headphones + Audio
Running Clothes + Accessories
- How to Choose Running Shorts
- Why Do Running Shorts Without Pockets Exist?
- How to Keep Running Shorts from Riding Up
- Is Your Sports Bra Making You Slower?
- Running Shorts with Built-In Period Briefs
The Honest Truth: 5 Gear Rules That Actually Matter
1. A GPS watch is the highest-leverage gear purchase
One running watch (Garmin Forerunner, Coros Pace, Apple Watch Ultra, Polar Vantage) replaces dozens of phone-based decisions: pacing accuracy, route mapping, heart rate at glance, training load tracking, post-run debrief. The economy gain isn’t about the watch making you faster — it’s about the data quality enabling smarter training decisions. The $250–400 mid-range Garmin or Coros is the right band for most runners; $700+ flagship watches are diminishing returns.
2. Garmin VO2 max + training load are good directional, not absolute
Wrist-based VO2 max estimates are accurate to within 3–5 ml/kg/min on average — useful for tracking your own trend over months but not for comparing yourself to other runners. Garmin’s training load and recovery scores are similarly directional: a sudden 50% jump means something; the absolute number doesn’t. Use the trend, ignore the precise figures.
3. The right sports bra is a real performance variable for women
Recent biomechanics work shows that high-impact sports bra support reduces vertical breast displacement by 70–80%, and the gait changes runners adopt to compensate for inadequate support measurably worsen running economy1Burbage J, Cameron L. The effect of breast support on vertical, mediolateral and anterior-posterior breast displacement during walking and running. Journal of Biomechanics. 2017;55:71–76.. Pay attention to bra fit before tweaking foot strike or stride length — the gear fix is bigger.
4. Most “running gear” is just clothing rebranded
Running-specific shorts, tops, and socks aren’t magic. The differences that matter: anti-chafe fit (no inner-thigh seams, no neck tags), pockets sized for gels and keys, fabric that wicks rather than absorbs (no cotton). Once those boxes are checked, premium running brands and mid-tier brands deliver roughly equivalent function. Save the budget for a quality watch.
5. Visibility gear is non-negotiable for early/late runs
Running on roads at dawn, dusk, or in the dark — even with a sidewalk — without high-visibility kit is the most under-acknowledged risk in the sport. A reflective vest plus a head-torch reduces driver-strike incidents by an order of magnitude vs. dark clothing. Costs less than a pair of shoes; lasts 5+ years; biggest single gear purchase by safety impact.
Frequently Asked Questions
Garmin or Coros for marathon training?
For most runners, Garmin — bigger ecosystem, more reliable GPS in tree cover, more developed third-party app integration. For runners who want longer battery life and a simpler interface, Coros. The Garmin Forerunner 265 and Coros Pace 3 are direct competitors at the same price point; both are excellent. The decision rarely matters unless you’re training for ultra-distance where Coros’s 38-hour battery life vs Garmin’s 24-hour pulls ahead.
Are Apple Watches good for running?
Apple Watch Ultra 2 is now competitive with mid-range Garmin and Coros for most running needs — accurate GPS, decent heart rate, good training metrics, and excellent integration with iPhone. The big trade-off: 36-hour battery life vs Garmin’s 7+ days for similar tier. For runners who don’t want a separate device, Apple Watch Ultra is genuinely good. For dedicated trail runners doing 6+ hour efforts, the battery is limiting.
Do I need running headphones?
For training, music or podcasts during easy runs improve adherence and reduce perceived effort (Karageorghis effect). For racing, the literature is mixed — some races ban headphones for safety reasons. Bone-conduction headphones (Shokz OpenRun) keep ambient awareness and are the safer choice for road running. AirPods Pro work well but isolate you from traffic — use only on trails, tracks, or treadmills.
What’s a good running watch budget?
$200–400 is the sweet spot for most runners. Below $150, you’re typically getting less reliable GPS and short battery life. Above $700, you’re paying for niche features (mapping, satellite messaging, sapphire glass) that most road runners don’t need. Garmin Forerunner 265, Coros Pace 3, and Apple Watch SE all sit in the right band.
Do I need a hydration vest?
For long runs over 90 minutes, especially in hot weather, yes. A 1–2L soft-flask hydration vest is the cleanest option for runs over 2 hours. For shorter runs, a handheld water bottle or just stashing water along your route works fine. Hydration belts (waist-mounted) are common but tend to bounce; vests are better-tolerated for long durations.
