It's 48 hours after being back at Sea Level and it's time to roll! We set up a 4 mile tempo on tired legs to see what we can learn about Arsene's adaptations to the training trip and returning to sea level! Things are very different compared to when we left! 1- There's an adjustment period after coming down from altitude. 2- That period is different for everyone. 3- Track it so you can repeat it when it counts. Coaching: www.thunderroadrunning.com/coaching.html Running Camps: www.thunderroadrunning.com/camps.html Thunderbird GEAR: www.thunderroadrunning.com/gear.html