Your biggest worry, based on background, I say is making sure you stay injury free.
The best way to stay injury free is make sure you dont ever do it. Your cardio engine is there, but your legs will not. You need to make sure to slowly increase milage and speed… Maybe spend a few weeks adding miles to your running before attempting run workouts…
Its shouldn’t be too hard, just take it easy.
Yup. That’s what I’ve been doing for 4 months.
Easy endurance / tempo on “hard” days ( I was struggling running very slow, I had the same prpblem statting cycling ).
Now I run 2 to 3 times a week, 30min to 1h max.
I still got too greedy on september though.
I ran to my limits a few times with this too little training ( now I know that running 1h30 with no rest is my limit ).
I planned to have a rest week, but felt good and instead decided to have a last running week before rest week.
And obviously it was too much. The first workout of the week was painful and I had to stop entitely for 3 weeks.
But now I know my limits, warm up even more ( 15 minutes with a high emphasis on knees and ankles + 5 to 10min easy running ) and plan on adding 1 intensity session a week on february ( and from this point I will do 3/1 block periodization, assuming it works like it does in cycling ).
Until then, easy runs 
The basic army initial test is on April. I’m pretty confident about it.
As for equivalency, I’m gonna take into account your experiences, and roughly go with the 1:2 ratio, maybe 1:3 if I feel the need to be safe.
I was planning on doing 5h, progressing up to 8h a week of running but I might dial it down a bit.
( plus I won’t just do running, there will be rucking, a bit of swimming, and muscle strengh exercises so I think it’s safer this way ).
Pardon the necropost, but I wandered here, so why not.
For a distance comparison, it’s interesting to look at the hour record for running and cycling, because we have athletes with equivalent conditioning (elite) and experience to compare.
On that basis, (max effort for an hour, exhausted afterwards) cycling covers 2.75 times the equivalent running distance. A top pro cyclist could probably cover (ballpark) 120km in the time a top pro runner does a marathon, which I think roughly tallies with pro race pace?
Recovery wise, cycling is less traumatic. I have one or two friends who could run a marathon below threshold (say 3hrs) and feel ok the next day, but they’re very good. I think more cyclists could cycle 120km in 3hrs and feel ok the next day. So, I’d agree with the previous posters. Cycling takes longer to take the same physical toll (perhaps twice as long).
This question is a bit ill-posed. I haven’t seriously taken a crack at running in 12 years, but when I did, I quickly found out that my training time was limited by the impact on my joints. Running too much would very, very quickly anger my bad knee.
Endurance rides have very little impact in terms of fatigue (for me) while even slow runs could result in fatigue or joint pain.
That is one reason why I gave up on running as a sport for me despite having good genetics. Is your body ok with you running? I reckon these issues will be exacerbated with age.
What are your goals? Why do you want to get into running?
+1. Cycling is closer to swimming rather than running in regards to impact. In my experience you can recover faster and like swimming, can do a lot more intensity.
I’ll tell you what. I’ve raced against former collegiate mid distance guys and they are VERY strong cyclists. I don’t often hear about cyclists becoming very strong runners. Form matters a lot more in running, any athlete can pedal a bike, it’s not difficult.
I’m diversifying my fitness and plan to start running more, we’ll see how it goes.
I’m time challenged so I added running to my routine. You can get a good run workout in less time and less fuss than with cycling. All you need for running is a pair of running shoes and you are ready for a workout. Plus, at 57 years old, running is good for bone density. So now I do two runs, two bike rides and two weight lifting sessions per week and I feel strong and healthy for whatever challenges the day brings my way. If someone asks me to go run a 10k with them I’m ready for that…If someone asks me to go on a 100k bike ride I’m ready for that…or if someone needs help moving a couch or piece of furniture I’m ready for that.
You just run in your everyday clothes.?
You can but I would not recommend it. My jeans get really sweaty in warm conditions when I run in them.
That’s what I was trying to get at. If you are also changing into running clothes to go running then it’s not much different to cycling clothes for cycling. Marginally less effort to get out compared to cycling, but not a lot.
With running I don’t have to worry about chamois creme, eyewear, helmet, gloves, AXS battery charged, chain lubed, etc. It’s saves me much time which is nice because it frees me up for other activities. Cycling is fun but it can be all consuming if you let it. I don’t want to get to the end of my life and wish I had spent more time knowing and developing with my kids and grandkids.
Loose shorts, vest and slipping on my sandals for running , vs Lycra bibs, jersey with a zip, mitts, helmet, getting the bike out of the garage and away again when I get home. If I’ve got less than an hour I’ll get 5-10 more minutes moving time more running than cycling.
Less than an hour then specialist cycling kit or creams are not necessary.
but he does have a valid point with it takes more time to get out the door with the bike than with running shoes. If you aren’t blessed to have decent roads/trails literally on your doorstep than travel time plays into it. I do have a bike/trainer already set up in my house so it’s less of an issue for me. However, if you don’t have the space to devote to a permanent setup than the run is a less time-consuming way to manage cardio. I can slip out of pants/shirt, into a pair of shorts/no shirt, slide into shoes and the longest part of my transition for a run is a stop to pee.
I really don’t understand why you’re standing on this soapbox. I think this would be a much better thing to share in the unpopular opinions thread. I’m pretty sure it’s generally accepted that it’s far easier and faster to go for a run than a ride and that it requires almost zero gear maintenance and upkeep.
I’d say slightly easier, the amount of gear is same then just bike in top. I can get bike out and be on my way in way under 5 mins. I wouldn’t say running is way easier. It may be in your situation but that doesn’t apply universally.
So before and after a bike ride, I have to prep and charge/mount the computer, lights, occasionally charge the shifter and derailleur batteries, lube the chain, wash the bike, pump the tires, prep bottles/food, put on bibs, jersey, gloves, helmet…
For a run, I put on shorts and a shirt, maybe an hrm, and go for a run. Also, I do it right out the front door almost any hour of any day, etc. And, the workout time is also usually much shorter. It’s not close at all.
I guess if you ride a single speed, don’t ever wash or lube it, wear street clothes, don’t use a computer, and only do 45-60 minute workouts, it might be close, but you still have to do bottles, pump tires, etc.
Sounds like a lot of faffing going on here in general. Just get out in the bike!
I can be out riding within 3 mins. It’s just a change of clothes, grab a bottle of water, pop on some shoes with Boas, pick up a bike and start pedalling.
I might take a little bit longer for longer rides. But when you’re short on time you just get out of the door and spinning. Running, I can be out the door in 2 mins. But riding a bike is worth that extra 60s as it doesn’t suck.
What you have to do doesn’t apply universally. Thus for your setup you do a lot of extra work for bike rides outside. I get bike out, go for ride, get back, put bike away. That is it, and takes hardly any time at all Then about once every 700km or so the chain needs some oil.