C25K helped me start my running journey! Since becoming a graduate of the C25K app, I have since completed the 10K app and will be starting the half marathon app as well. I have completed 4, 5K's and logged MANY miles on my own since the beginning. I have lost 45 lbs. and have never felt better! I'll be turning 50 next year & will also be doing my first half marathon, cannot wait for this! Thank you so much Zen Labs for creating these programs for someone like me who was new to the running world ~ I am forever grateful!!!