Man this chick rules, and she’s definitely a better instructor than Scooby.
Doing outside cardio is the way to go. Jogging up of hills is very cool, I tried it.
Edit to add: Also, another idea for an intense cardio workout is that since Winter is coming do some jogging outside in the snow. It may be tough and challenging but it’ll feel good, and I’m gonna go for it this coming Winter.
Kev
K'Brocking 
No doubt, she is really better than the other guy. Running on treadmill in winter would be a good option for runners. And you can do HIIT training which is really effective short session on burning calories. Or you want a long relax running while you’re watch TV.
George from lifespanfitness.com.au
Yep, she is definitely one hot and sexy looking lady. It’s too bad she lives in a different country. She sounds like she’s from the UK or something. If she lived in my area, I would definitely hire her as my trainer!
Kev