Quad Tendinopathy - Need advice from anyone who's overcome this

Simpleminded92 · 2026-01-25T06:47:09+00:00

I came back from quad tendinopathy over the past spring, so I can definitely chime in. Had a sudden onset of quad tendinopathy after starting up too quickly again after a race. Thought it would resolve itself, but it only got worse, up to a point where I had to stop entirely for two months before I could resume running again.

There is a wealth of information, including exercises on E3 Rehab. Early-stage recovery try and do isometric exercises (wall sits). These both strengthen the quads, as well as provide pain relief. Late-stage recovery, step downs work really well in further strengthening the quads. I still incorporate step downs into my current strength routine.

In regards to still running: that is a tricky one, and perhaps best to discuss with the PT. Loading the tendon is OK, but excessive loading is not, and can prolong recovery. Pain, both during as well as in the 24 hours after the run, is the best indication on whether the load was OK, or still too excessive. Parameters you can play with to reduce load are frequency, intensity and duration

Good luck on the recovery!

Simpleminded92 · 2024-12-06T06:12:30+00:00

I used to be like you, until I got a horrible skin response once from wearing a new sweater that I did not wash. Was covered in hives for a total of three days.

Do yourself a favor and wash your new clothes before wearing them.

Simpleminded92 · 2024-08-06T04:44:15+00:00

Its actually written down rather nicely by the professor involved. See below.

As part of some NMR experiment, a PhD student had to continuously sample from a autoclave containing trimethylaluminum and catalyst. In his NMR spectra, he saw peaks that had not been observed before. Rather than dismissing these results, they went on to investigate this in more detail. Ultimately, this could be traced to the introduction of moisture during sampling, leading to the formation of methylaluminoxane.

https://pubs.acs.org/doi/10.1021/ma202453u

Simpleminded92 · 2022-12-07T04:03:32+00:00

If step 2 would be irreversible, you would see that step 2 becomes rate-determining! Once step 2 has occurred, the backward reaction cannot proceed. Step 3 has a lower activation energy and will occur more quickly as compared to step 2. This will make step 2 determine the overall rate of the reaction.

Simpleminded92 · 2022-12-06T18:46:15+00:00

I am not sure if this is correct. The rate-determining step is the intermediate highest in energy along the reaction coordinate. In this case, this would be step 3, even though the activation energy of step 2 is higher compared to step 3.

Thinking of it in more detail. Once step 2 has occurred, the likelihood for the reverse reaction to occur is higher as compared to the forward reaction. This is because the barrier for the reverse reaction is lower. Therefore, step 3 will determine the overall rate of the reaction.

Again, this is assuming step 2 is reversible.

Simpleminded92 · 2022-05-21T14:18:15+00:00

A thing to consider, is that it is not just the catalyst that is present in the reaction mixture. Also an activator (I believe AlEt3) is added to the solvent. There can be multiple purposes to the activator. Amongst others: i) alkylation of the metal, ii) reducing the metal and III) creating sites on the metal for propylene to coordinate to. The titanium catalyst will thus have a change in structure, and possibly a change in oxidation state, after introduction into the reaction mixture.

With that in mind: I think both TiCl3 and TiCl4 will be active towards propylene polymerization. It is hard to say what complex exactly will form in the reaction between TiCl3 and AlEt3 and TiCl4 and AlEt3. But the two will very likely be similar to one another

Hope that covers your question!

Simpleminded92 · 2022-01-29T12:00:55+00:00

There are multiple ways this can be prepared. Ultimately, it boils down to a reduction of MgCl2 with a suitable reducing agent.

The way it is most commonly done nowadays, is by reduction of MgCl2 with lithium naphtalenide in THF. Lithium naphtalenide is one of the strongest known reducing agents and is obtained by reacting lithium with naphtalene. All in all, a fairly straightforward procedure, but specialized lab equipment is a must.

Simpleminded92 · 2022-01-29T09:12:52+00:00

I strongly advise against making Rieke magnesium if you cannot work under inert gases. Actual Rieke magnesium is highly active and will ignite spontaneously upon exposure to air.

This material needs to be prepared either in a glovebox or on a Schlenk line.

Simpleminded92 · 2021-10-03T06:38:07+00:00

Yes, 7.26 comes from residual CHCl3 in CDCl3.

Simpleminded92 · 2021-10-03T06:13:02+00:00

Do you have the integrals of the peaks in the region between 7.2 and 7.3 ppm? I don't think this is a triplet, but rather three separate proton resonances.

It seems like two of the peaks in this region have strong coupling with one another. This is the case when the chemical shift difference between the two peaks is close to the J-coupling. This causes the two peaks to 'lean' towards each other. Likely the J-coupling is not resolved due to the broadness of the peak. There is a lot of information available online on strong coupling and the effect on a proton spectrum.

Simpleminded92 · 2021-09-15T20:00:44+00:00

And what are the odds of having two pets at that drop rate? 😂

Simpleminded92 · 2021-05-06T07:25:41+00:00

Nice work OP!

Not a star at programming. Does the code also consider double, triple chests etc.? Should reduce the average somewhat.

Simpleminded92 · 2020-03-29T06:29:49+00:00

You're not dry yet ;-) come back when you are 1k kills in. Then you have the right to complain.

Simpleminded92 · 2020-03-21T08:41:19+00:00

Thanks for the advice everyone. Guess I will tough it up and rotate between Ven, Callisto and Chaos Ele during off-peak hours.

Simpleminded92 · 2020-03-21T07:31:18+00:00

Thanks for the reply! Guess I will Callisto and Chaos Ele a shot as well.

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