In July heat, reaction time and decision making can drop fast. A goalie who’s even mildly dehydrated can see measurable drops in reaction speed and decision-making before they ever feel “tired.” That’s the part most players miss: the slowdown happens before the cramp, before the obvious fatigue, before you’d ever think to blame the heat for a goal you should’ve had.

What’s actually happening:

Dehydration reduces blood volume, which reduces oxygen delivery to the brain and muscles. The first systems to degrade aren’t strength or stamina, they’re fine motor control and reaction speed. For a goalie, that means the half-second decision on a low-to-high shot is exactly the half-second you lose first in the heat, long before you’re gulping water on the sideline wondering what happened.

Three things that actually move the needle in peak summer conditions:

1. Hydrate before the heat hits, not during it. By the time you’re thirsty mid-tournament, reaction time has already started slipping. Front-load fluids the night before and morning of. Aim for 1-1.5 gallons a day during intense tournament periods.
2. Build a conditioning base that holds up late in games, not just early. This is exactly what AGA’s strength and conditioning programs are built around.
3. Train reaction time directly, not just generally. General conditioning helps you survive the heat. Specific reaction-time work helps you stay sharp in spite of it.

If you’re playing through peak summer heat every weekend this month, the Reaction Time and Foot Speed plans are built to maintain exactly the systems that degrade first under fatigue and heat, and the Lifting Program builds the conditioning base underneath both of them.

You can find these plans and over 200 drills in The Ultimate Lacrosse Goalie Drill Library by clicking here. Or you can get the specific plan that you want, yours to keep for life, by clicking here.