I’ve been on the other side of the world for a month and haven’t run for 5 weeks. Before then I had graduated from C25K, was running regularly and could do 5k in about 35 mins. I’m in my early 60s. I don’t know how to find out what my current level of fitness is. How do I start again? Do I need to go back to the start of the programme? Also not sure about the effects of long distance air travel and jet lag. I got back 2 days ago after travelling for over 24 hours. Any advice gratefully received as I’m keen to get my running shoes back on.