function calcPB(){var time=document.getElementById("time").value||"1:15";var type=document.getElementById("type").value;var p=time.split(":");var secs=parseInt(p[0])*60+(parseInt(p[1])||0);var mult=type==="small"?0.97:type==="med"?0.95:0.93;var adj=Math.round(secs*mult);var saved=secs-adj;document.getElementById("r1").textContent=Math.floor(adj/60)+":"+String(adj%60).padStart(2,"0");document.getElementById("r2").textContent="+"+saved+"s faster";document.getElementById("desc").innerHTML=""+type+" pull buoy compared to normal swim:
100m with pull buoy: "+Math.floor(adj/60)+":"+String(adj%60).padStart(2,"0")+"
Time saved: +"+saved+" seconds per 100m
Pull buoys eliminate leg kick, letting you focus on upper body pull technique. Use them for pull sets and technique work.";document.getElementById("results").style.display="block";}