Your personal Tumblr journey starts here
Now that I've taken a nap, let me continue.
Surviving in the wilderness is hard. Like, really hard. And Senku did it by himself for six months without any kind of modern tech or intervention.
Now, I can hear you now saying "But Red, Senku is a scientist who is shown to know basic survival tactics," to which I remind you that knowing how to do something and actually being able to do it are two very different monsters. And Senku, as seen, doesn't get it right at first, which means he has to keep trying, over and over and over or risk illness/death.
Senku has to rely on primitive hunting and gathering techniques, he has to chop wood, make leather and craft basic clothing and shoes, and build both a shelter and a lab. Someone who has no real physical strength can't really do that. And even if we assume Senku went into this with little muscle in the first place, he certainly has built himself up by the time he and Taiju meet again for the first time, and likely even more so as he continues to do his projects.
He still has his limits, and he'll never be as OP as Taiju or Tsukasa in the strength department, but he's not weak or incapable this is one of several hills I will die on when it comes to Senku (and this show/manga in general)
Senku is not physically or athletically inept, and yes I will elaborate.