Is the title of this video click-bait ... ??? I don't think so.
To get the most from your long, triple and sprint conditioning what you do away from the pit or the track needs to be transferable and relevant. There are many who swear by weight training and "need" to lift weekly - however, there are many who lift much less sparingly without their performances suffering. and in fact improving.
If you are a regular reader of this blog or watcher of my YT channel videos you'll know that I don't place weights at the top of my "conditioning hierarchy". I'd rather spend time working on technique and speed and using plyometrics and sets of different sprint drills to develop what's required. I do however, see weights as having a role and that's to create robustness - that required to withstand injury (but note that this can also be achieved via many other means such as Swiss balls, and body weight exercises). I also value weights for the more conditioned athletes in the group and in particular utilise Triphasic methods - that's combining eccentric and isometric weights exercises with the much more common - and dare I say after a while, less important - concentric one. 
Also, by combining weights and plyos into a workout (Contrast/Complex training) you are more likely to get a heightened fast twitch muscle fibre and motor unit response - so this is something that we do regularly.
The video below goes into more detail about my thoughts on what weight training to do to really  improve your sprinting and jumping. It also looks at the limitations of a more traditional approach.

It's been a busy end to the season for me and it seems that I'll be back into coaching before I've had time to think and rest up! What with the schools national multi-events final in Exeter at the end of September training had to continue for the three athletes involved - who incidentally did really well with 4th, 5th and 9th places in three different age groups. However, it's now time to start back with the main group again and their long and triple jump preparations for 2020.
This year I did manage to have a sit down and chat with a couple of the older athletes and we discussed what we might like to change and add into training for the next training year. There will be some small changes, mainly on the conditioning front - which I'll say more about on this blog or in another video on my YouTube channel. Last year we did more eccentric work and more sprint work too and it seemed to work. Over my time coaching I have found it's very much a case of "what you do but what you don't do". There are lots of relatively superfluous exercises and drills that are really a bit of a waste of time.
The latest video on my YouTube channel is relevant in this respect and is linked below. It's all about pre-training and drills, for example, which we do do. Pre- training is all about doing exercises designed to combat and reduce injury potential. 
We do these across the whole training year with the thought process being that they will continue to strengthen the body and make it more robust. Without wishing to tempt fate, it must be working, as few of the athletes in the group suffer from strains and sprains.  
My YouTube channel now has over 12k subscribers and seems to be developing nicely ... so thanks to all of you who have supported it and do check out the Jumps Squad gear that I'm now able to produce - T-shirts, hoodies and even phone cases.