:minutes:seconds): : : Please estimate my time for: kilometresmilesPredicted time (hours:minutes:seconds): : : The formula was originally devised by Pete Riegel, a research engineer and marathoner, and published in Runner's World, most recently by Owen Anderson in 1997

, but your new training paces might come as a surprise too. Before you get started, work out the right benchmarks to work towards by finding your maximum heart rate. If you're a complete beginner, start off with this very approximate formula: 214 - (0.8 x

Min.value = minPercent;');eval('document.hr.' + tpe + '_hrMax.value = maxPercent;');document.getElementById('hr_' + tpe).innerHTML=(parseInt((max/100) * minPercent)) + '-' + (parseInt((max/100) * maxPercent));}function paceChanged(){var dd = document.getElementById('pace

of running five or six one-mile reps at 10K pace, but just remember that you have to do this, without any rest, in a race anyway. Try to fit in at least one session a week, and mix pure speed sessions with speed-endurance sessions for the best of both worlds

Ease into faster running with these introductory sessions:1. Easy fartlekFartlek, or speed play, is variable-paced running that emphasises creativity. During a 30-minute run, choose objects to run to – lamp-posts, trees, buildings, other runners

Remember these 10 tips when you start adding the fast stuff to your running programme:1. Graduate from basic training If you’re a novice runner, you need at least three to four months of building up before starting speedwork. Meaning? You should

- is to run the final fast stint as strongly as the first one. If you have a race in mind, try to build up to running each repetition at race pace (or faster for half-marathons, marathons and very fit runners).A simple session is to have equal-length efforts

: In the last few weeks, I've been reminded how much I enjoy running with other people - when I'm out on my own, it's so much harder to keep going and keep up the pace. I'm a morning runner, and after having to reschedule a long run I also learned the hard way

very good race but I’m not upset - I’ve had a fantastic journey and there will always be other races. I knew from Mile 3 that things weren’t going well. I was trying to hold 3:20 pace for the first 5K but my legs weren’t working properly, and I really

, quickens your stride, expands stride length, develops your cardiovascular system, enhances your running economy and can even protect your leg muscles against soreness. In short, hill running will make you a stronger, faster and healthier runner. What’s more