I used a 5k PB Interval Session from the ‪@runningchannel‬ to see how much faster I could get in 4 weeks! I lost so much speed when I was training for my half marathon, so I am determined to get faster this year in all distances. I hope you enjoy watching me in pain, pushing my pace . Are you trying to get a faster time in any races this year? I'd love to know in the comments