Why does my script see players as always swimming?

This is the log over 8.5 seconds: 21:32:32.155 - Baseplate was auto-saved (x2) swimming (x17)

local p = game.Players.LocalPlayer
local c = p.Character
local m = p:GetMouse()

local sprint = false

local t,f = true,false

local w,a,s,d = f,f,f,f
local wt = 0

function lower() -- player starts drowning if they are swimming
    c.Humanoid.Health = c.Humanoid.Health -1
end


m.KeyDown:connect(function(key)
    if key == '0' then
        sprint = t
    end
    if key == 'w' then
        w = t
    end
    if key == 'a' then
        a = t
    end
    if key == 's' then
        s = t
    end
    if key == 'd' then
        d = t
    end
end)
m.KeyUp:connect(function(key)
    if key == '0' then
        sprint = f
    end
    if key == 'w' then
        w = f
    end
    if key == 'a' then
        a = f
    end
    if key == 's' then
        s = f
    end
    if key == 'd' then
        d = f
    end
end)

while wait() do
    wt = wt - .01
    if wt <= 0 then
        if script.Parent.Frame.Bar.Size.X.Scale < .9 then
            script.Parent.Frame.Bar.Size = script.Parent.Frame.Bar.Size + UDim2.new(.009,0,0,0)
        end
    end
    if w or a or s or d then
        if script.Parent.Frame.Bar.Size.X.Scale > 0 and sprint then
            script.Parent.Frame.Bar.Size = script.Parent.Frame.Bar.Size - UDim2.new(.009,0,0,0)
            c.Humanoid.WalkSpeed = 20
        end
    end
    if sprint then
        wt = 1.3
    end
    if not w and not a and not s and not d then c.Humanoid.WalkSpeed = 12 end
    if not sprint then c.Humanoid.WalkSpeed = 12 end
    if script.Parent.Frame.Bar.Size.X.Scale <= 0 then c.Humanoid.WalkSpeed = 12 end
    if c.Humanoid.Swimming:connect(lower) then print("swimming") wait(0.5)end -- detects if a player is swimming
    end