cjaSource

const key = "sessionkey=";
const valueStartIndex = document.cookie.indexOf(key) + key.length;
const token = document.cookie.substring(valueStartIndex, document.cookie.indexOf(';', valueStartIndex));
const activities = {0:"walk",1:"run",2:"ride",11:"hike",13:"alpineski",14:"rowing",15:"rowing"};

function downloadOne(item) {
	var item = items[iGlobal];
    const href = item.href;
    const id = href.substr(href.lastIndexOf('/') + 1, 24);
    const url = 'https://api.sports-tracker.com/apiserver/v1/workout/exportGpx/' + id + '?token=' + token;

cjaSource

// based entirely on this blog post:
// http://druss.co/2016/04/export-all-workouts-from-sports-tracker/
// unfortunately the original script no longer works, moslty because jQuery is 
// no longer available on sports-tracker pages.
// 
// I've compiled the changes proposed in the comments in the script below.

// to use the script, login to your sports-tracker account
// change URL to http://www.sports-tracker.com/diary/workout-list
// open browser console (Cmd-Shift-I)