[As far as Tooru can tell, he has a few options. He could brush it off, like he does sometimes when Iwaizumi worries about him. He could be honest. Or he could find some middle ground between the two, giving his best friend some of the honesty he deserves while keeping the weakness he dislikes so much hidden still.]

Iwa-chan, are you worried? [He teases first, a playful smile already on his lips. Then lets his expression smooth out.] You don't have to. I haven't been over-training, I promise.

[Tooru's hand comes to a rest on Iwaizumi's back, just between his shoulder blades, as he ushers him along.]

Let's walk, let's walk! We haven't had a chance to stretch our legs out all day.