Long run safety during marathon training

Why the long run is its own kind of risk

A weekday 5-mile run is short, local and familiar. The long run is none of those. By peak weeks you may be out for three hours, on a route that reaches 8 or 10 miles from your door, on a morning when the city is still waking up. If you are training for an October or November marathon, the longest runs usually land in August and September, so heat and humidity sit right on top of your hardest training.

The last third of a long run is where problems cluster. Glycogen runs low, concentration slips, and you are more likely to trip, misjudge a crossing or push through warning signs you would respect on fresh legs. You are also as far from home as you will get. That is the stretch to plan for.

Heat is the long-run danger to take seriously

Heat illness can come on gradually over a long effort. The National Weather Service lists throbbing headache, confusion, slurred speech, nausea, dizziness, fainting and hot, red, dry or damp skin among the warning signs of heat stroke, and treats it as an emergency: call 911 or get the person to a hospital immediately.

The catch is that confusion is itself a symptom, so the person with heat stroke may not recognize it or be able to call. That is one reason a return time matters on summer long runs. The other reasons are simpler: start early, plan water every few miles, and shorten or move the run on the hottest days. Our heat safety guide for runners covers the details, and how to stay safe running in the heat is the short version.

Plan the route before long-run morning

Point-to-point long runs are great for morale and harder on safety, because every mile takes you further from where you started. If you do one, tell your Guardian where you will finish and how you are getting back.

• Loops or out-and-backs that pass your car or home once or twice, so you can restock or bail.
• Water you can count on: fountains that are actually on, a store, or bottles you stash the night before.
• Bail-out points: a transit stop, a friend's street, a spot a rideshare can reach.
• Coverage: long stretches of river path or rail trail can have weak signal, so know where they are.
• Shade and timing: put the exposed miles early, before the sun is high.

Sharing a long run with Holler

Holler cannot sense heat illness or a heart problem. What it can do is notice that you stopped or did not come back, and tell someone who can act.

The buffers are a starting point, not a rule. After two or three long runs with a return time, you will know how far past your plan you tend to finish, and you can set the buffer from that.

A peak-week 18-miler, planned out

Say your long-run pace is 10:30 per mile. Eighteen miles is about 3 hours 10 minutes of running. Add 10 minutes for two refills and a bathroom stop, and you expect to finish around 3 hours 20 minutes after you start. You leave at 6:00 a.m., so you expect to be home at 9:20 and set the return time for 9:50.

The route is two loops: a 10-mile loop that passes your house at mile 10, where you left bottles and gels on the porch, then an 8-mile loop past a gas station at mile 14. That gives you two places to stop, restock or quit. The exposed stretch along the river goes first, before 7:30.

You set a stationary alert of 12 minutes, longer than the gas station stop. At mile 16 you feel dizzy and sit in the shade for a few minutes. It passes, you walk to the end, and your Guardian, who saw the dot pause, texts to check. That is the system doing its job without an emergency. Had the dizziness not passed, or had you felt confused, the right move was to stop and call 911.

What your Guardian should know

Tell them the plan the night before: distance, route, expected finish time, and where the water is. A long run that runs 20 minutes late is usually just a slow day, so the overdue alert should prompt a call, not a search.

What changes that is no answer, a dot that has stopped away from any water stop or store, or a call where you sound confused. On a hot day, confusion is a reason to call 911 with your location from the link. Holler does not contact 911, so your Guardian needs to be comfortable making that call. Send them when to worry if someone is late back from a run.

The night-before text might say: "18 tomorrow, two loops from home, past the house at mile 10 and the Shell on Oak at mile 14. Out at 6, home around 9:20, return time 9:50. If I'm overdue and don't answer, or I sound confused, call 911 and give them the last spot on the link."